Update actions/cache action to v4

Author: renovate[bot]

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
           distribution: temurin
           java-version: 17
       - name: Cache Gradle packages
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}
@@ -38,7 +38,7 @@ jobs:
           distribution: temurin
           java-version: 17
       - name: Cache Gradle packages
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}