[MNT] Bump actions/checkout from 5 to 6 in the github-actions group (#3132)

Bumps the github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/fast_release.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-24.04
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6

.github/workflows/issue_assigned.yml

@@ -21,7 +21,7 @@ jobs:
           private-key: ${{ secrets.PR_APP_KEY }}
 
       - name: Checkout main
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           sparse-checkout: .github/utilities
 

.github/workflows/issue_comment_edited.yml

@@ -22,7 +22,7 @@ jobs:
           private-key: ${{ secrets.PR_APP_KEY }}
 
       - name: Checkout main
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           sparse-checkout: .github/utilities
 
@@ -43,7 +43,7 @@ jobs:
 
       - if: ${{ steps.label_out.outputs.expected_results == 'true' || steps.label_out.outputs.empty_commit == 'true' }}
         name: Checkout head
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ${{ steps.label_out.outputs.repo }}
           ref: ${{ steps.label_out.outputs.branch }}

.github/workflows/issue_comment_posted.yml

@@ -10,7 +10,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           sparse-checkout: .github/utilities
 

.github/workflows/periodic_tests.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6
@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6
@@ -50,7 +50,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install latest version of bash
         run: |
@@ -96,7 +96,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6
@@ -121,7 +121,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6
@@ -167,7 +167,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python
         uses: actions/setup-python@v6
@@ -220,7 +220,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6
@@ -260,7 +260,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6
@@ -300,7 +300,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6

.github/workflows/pr_core_dep_import.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python 3.12
         uses: actions/setup-python@v6

.github/workflows/pr_examples.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install latest version of bash
         run: |

.github/workflows/pr_label_edited.yml

@@ -15,7 +15,7 @@ jobs:
           app-id: ${{ vars.PR_APP_ID }}
           private-key: ${{ secrets.PR_APP_KEY }}
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           sparse-checkout: .github/utilities
 

.github/workflows/pr_labelled.yml

@@ -22,7 +22,7 @@ jobs:
           private-key: ${{ secrets.PR_APP_KEY }}
 
       - name: Checkout main
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           sparse-checkout: .github/utilities
 

.github/workflows/pr_opened.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           sparse-checkout: .github/utilities