Update actions/checkout action to v4.2.1

Author: renovate[bot]

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
       matrix:
         java: [ 11, 17 ]
     steps:
-      - uses: actions/[email protected].0
+      - uses: actions/[email protected].1
         with:
           fetch-depth: 100
       - name: Fetch tags

.github/workflows/release.yml

@@ -8,7 +8,7 @@ jobs:
   release:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/[email protected].0
+      - uses: actions/[email protected].1
         with:
           fetch-depth: 0
       - uses: olafurpg/setup-scala@v14