chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/build-test.yml

@@ -25,7 +25,7 @@ jobs:
         os: [ubuntu-latest]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Node
       uses: actions/setup-node@v2
       with:

.github/workflows/deploy.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         persist-credentials: false
     - name: Set up Node

.github/workflows/integration-test.yml

@@ -19,7 +19,7 @@ jobs:
         os: [ubuntu-latest]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Set up Node
       uses: actions/setup-node@v2