dependency: Update gradle/actions action to v6 (#367)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -24,7 +24,7 @@ jobs:
           distribution: 'temurin'
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
 
       - name: Set Variables & Build
         uses: actions/github-script@v8

.github/workflows/hangar-publish.yml

@@ -24,7 +24,7 @@ jobs:
           distribution: 'temurin'
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
 
       - name: Publish to Hangar
         run: ./gradlew :eternalcombat-plugin:publishPluginPublicationToHangar

.github/workflows/modrinth-publish.yml

@@ -24,7 +24,7 @@ jobs:
           distribution: 'temurin'
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
 
       - name: Publish to Modrinth
         run: ./gradlew :eternalcombat-plugin:modrinth