Update actions/checkout action to v4.3.0 (#1349)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     name: Linting
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.2.2
+      - uses: actions/checkout@v4.3.0
       - uses: pnpm/[email protected]
         with:
           version: ${{ env.PNPM_VERSION }}
@@ -36,7 +36,7 @@ jobs:
         os: [ubuntu-latest, windows-latest]
         node-version: [18.x, 20.x, 22.x]
     steps:
-      - uses: actions/checkout@v4.2.2
+      - uses: actions/checkout@v4.3.0
       - uses: pnpm/[email protected]
         with:
           version: ${{ env.PNPM_VERSION }}
@@ -66,7 +66,7 @@ jobs:
           - embroider-safe
           - embroider-optimized
     steps:
-      - uses: actions/checkout@v4.2.2
+      - uses: actions/checkout@v4.3.0
       - uses: pnpm/[email protected]
         with:
           version: ${{ env.PNPM_VERSION }}
@@ -100,7 +100,7 @@ jobs:
           - ember-beta
           - ember-canary
     steps:
-      - uses: actions/checkout@v4.2.2
+      - uses: actions/checkout@v4.3.0
       - uses: pnpm/[email protected]
         with:
           version: ${{ env.PNPM_VERSION }}