Bump actions/checkout from 3.6.0 to 4.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.6.0 to 4.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@f43a0e5...3df4ab1)

Fixes #6699

RELNOTES=n/a
PiperOrigin-RevId: 562780684

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
         with:
           access_token: ${{ github.token }}
       - name: 'Check out repository'
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
       - name: 'Set up JDK ${{ matrix.java }}'
         uses: actions/setup-java@cd89f46ac9d01407894225f350157564c9c7cee2
 
@@ -67,7 +67,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Check out repository'
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
       - name: 'Set up JDK 11'
         uses: actions/setup-java@cd89f46ac9d01407894225f350157564c9c7cee2
 
@@ -93,7 +93,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Check out repository'
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
       - name: 'Set up JDK 11'
         uses: actions/setup-java@cd89f46ac9d01407894225f350157564c9c7cee2
 

.github/workflows/gradle-wrapper-validation.yml

@@ -9,5 +9,5 @@ jobs:
     name: "Validation"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
       - uses: gradle/wrapper-validation-action@56b90f209b02bf6d1deae490e9ef18b21a389cd4

.github/workflows/scorecard.yml

@@ -32,7 +32,7 @@ jobs:
 
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
         with:
           persist-credentials: false