Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
   build:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-java@v3
         with:
           distribution: 'zulu'

.github/workflows/publish.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: macos-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up JDK 17
         uses: actions/setup-java@v3
         with: