Update actions/cache action to v6

Author: xdev-renovate

.github/workflows/check-build.yml

@@ -40,15 +40,15 @@ jobs:
         java-version: ${{ matrix.java }}
 
     - name: Cache Maven
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-mvn-build-${{ hashFiles('**/pom.xml') }}
         restore-keys: |
           ${{ runner.os }}-mvn-build-
 
     - name: Cache Vaadin prod bundles
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: |
           **/bundles/prod.bundle
@@ -102,15 +102,15 @@ jobs:
         java-version: ${{ matrix.java }}
 
     - name: Cache Maven
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-mvn-checkstyle-${{ hashFiles('**/pom.xml') }}
         restore-keys: |
           ${{ runner.os }}-mvn-checkstyle-
 
     - name: CheckStyle Cache
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: '**/target/checkstyle-cachefile'
         key: ${{ runner.os }}-checkstyle-${{ hashFiles('**/pom.xml') }}
@@ -138,15 +138,15 @@ jobs:
         java-version: ${{ matrix.java }}
 
     - name: Cache Maven
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-mvn-pmd-${{ hashFiles('**/pom.xml') }}
         restore-keys: |
           ${{ runner.os }}-mvn-pmd-
 
     - name: PMD Cache
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: '**/target/pmd/pmd.cache'
         key: ${{ runner.os }}-pmd-${{ hashFiles('**/pom.xml') }}

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
 
     # Try to reuse existing cache from check-build
     - name: Try restore Maven Cache
-      uses: actions/cache/restore@v5
+      uses: actions/cache/restore@v6
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-mvn-build-${{ hashFiles('**/pom.xml') }}
@@ -182,7 +182,7 @@ jobs:
 
     # Try to reuse existing cache from check-build
     - name: Try restore Maven Cache
-      uses: actions/cache/restore@v5
+      uses: actions/cache/restore@v6
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-mvn-build-${{ hashFiles('**/pom.xml') }}