chore(deps): update gradle/actions action to v6

Author: renovate[bot]

.github/workflows/main.yml

@@ -103,7 +103,7 @@ jobs:
             21
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
         with:
           cache-read-only: ${{ github.event_name != 'push' || github.ref != 'refs/heads/main' }}
           validate-wrappers: false
@@ -216,7 +216,7 @@ jobs:
           java-version: 21
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
         with:
           cache-read-only: true
           validate-wrappers: false
@@ -253,7 +253,7 @@ jobs:
           java-version: 21
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
         with:
           cache-read-only: true
           validate-wrappers: false
@@ -290,7 +290,7 @@ jobs:
           java-version: 21
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
         with:
           cache-read-only: true
           validate-wrappers: false