chore(deps): Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/bump-version.yml

@@ -13,7 +13,7 @@ jobs:
   bump-version:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
         persist-credentials: false

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
       JAVA_OPTS: -Xms2048M -Xmx2048M -Xss6M -XX:ReservedCodeCacheSize=256M -Dfile.encoding=UTF-8
       JVM_OPTS:  -Xms2048M -Xmx2048M -Xss6M -XX:ReservedCodeCacheSize=256M -Dfile.encoding=UTF-8
     steps:
-      - uses: actions/checkout@v5.0.1
+      - uses: actions/checkout@v6.0.1
         with:
           fetch-depth: 0
       - uses: actions/setup-java@v5
@@ -47,7 +47,7 @@ jobs:
       AWS_REGION: ap-northeast-1
       TEST_TIME_FACTOR: 5
     steps:
-      - uses: actions/checkout@v5.0.1
+      - uses: actions/checkout@v6.0.1
         with:
           fetch-depth: 0
       - uses: actions/setup-java@v5

.github/workflows/publish.yml

@@ -11,7 +11,7 @@ jobs:
       SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
       PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with: { fetch-depth: 0 }
       - uses: actions/setup-java@v5
         with: