Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -23,7 +23,7 @@ jobs:
     name: Test JDK ${{ matrix.java }}, ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
       - name: Setup Java ${{ matrix.java }} ${{ matrix.distribution }}
         uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5
         with:

.github/workflows/sonatype.yaml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
       - name: Setup Java
         uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5
         with: