chore(deps): update actions/checkout action to v4 (#112)

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

Author: renovate[bot]

.github/workflows/build.yml

@@ -39,7 +39,7 @@ jobs:
             test-java-version: 21
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - id: setup-java-test
         name: Set up Java ${{ matrix.test-java-version }} for tests

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

@@ -11,6 +11,6 @@ jobs:
   validation:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: gradle/[email protected]

.github/workflows/prepare-release-branch.yml

@@ -6,7 +6,7 @@ jobs:
   prereqs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Verify prerequisites
         run: |
@@ -25,7 +25,7 @@ jobs:
     needs:
       - prereqs
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Create release branch
         run: |
@@ -78,7 +78,7 @@ jobs:
     needs:
       - prereqs
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set environment variables
         run: |

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
             exit 1
           fi
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-java@v4
         with:
@@ -58,7 +58,7 @@ jobs:
 
         # check out main branch to verify there won't be problems with merging the change log
         # at the end of this workflow
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: main
 
@@ -70,7 +70,7 @@ jobs:
           fi
 
         # back to the release branch
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           # tags are needed for the generate-release-contributors.sh script
           fetch-depth: 0

.github/workflows/reusable-markdown-link-check.yml

@@ -7,7 +7,7 @@ jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install markdown-link-check
         # TODO(jack-berg): use latest when config file reading bug is fixed: https://github.com/tcort/markdown-link-check/issues/246

.github/workflows/reusable-misspell-check.yml

@@ -7,7 +7,7 @@ jobs:
   misspell-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install misspell
         run: |