Bump actions/checkout from 2 to 2.3.4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 2.3.4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v2.3.4)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/analysis.yml

@@ -13,7 +13,7 @@ jobs:
       matrix:
         java: [ 11, 16 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Set up JDK ${{ matrix.java }}
         uses: actions/setup-java@v2
         with:

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
       matrix:
         java: [ 11, 16 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Set up JDK ${{ matrix.java }}
         uses: actions/setup-java@v2
         with:

.github/workflows/codeql.yml

@@ -30,7 +30,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v2.3.4
     - name: Setup Java JDK
       uses: actions/setup-java@v2
       with:

.github/workflows/examples.yml

@@ -13,7 +13,7 @@ jobs:
       matrix:
         java: [ 11, 16 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Set up JDK ${{ matrix.java }}
         uses: actions/setup-java@v2
         with:

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

@@ -6,5 +6,5 @@ jobs:
     name: "Validation"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: gradle/wrapper-validation-action@v1.0.3

.github/workflows/release.yml

@@ -7,7 +7,7 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - name: Set up JDK 11
         uses: actions/setup-java@v2
         with: