build: checkstyle in another workflow.

.github/workflows/check-style.yml

@@ -0,0 +1,23 @@
+name: Check Translations
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Checkout submodules
+        run: git submodule update --init --recursive
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          distribution: 'zulu'
+          java-version: '11'
+          java-package: jdk+fx
+      - name: Check style main
+        run: ./gradlew checkstyleMain
+      - name: Check style test
+        run: ./gradlew checkstyleTest

.github/workflows/gradle.yml

@@ -24,7 +24,3 @@ jobs:
       with:
         name: HMCL
         path: HMCL/build/libs
-    - name: Check style main
-      run: ./gradlew checkstyleMain
-    - name: Check style test
-      run: ./gradlew checkstyleTest