Fix yml syntax

.github/workflows/gradle.yml

@@ -23,15 +23,15 @@ jobs:
     - name: Clean
       run: yes | rm -rf ./arclight-coremod/build/libs
     - name: Cache Gradle User Files
-        uses: actions/cache@v1
-        with:
-          path: ~/.gradle
-          key: ${{ runner.os }}-gradle-user-home
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle
+        key: ${{ runner.os }}-gradle-user-home
     - name: Cache Gradle Files
-        uses: actions/cache@v1
-        with:
-          path: ./.gradle
-          key: ${{ runner.os }}-gradle-file
+      uses: actions/cache@v1
+      with:
+        path: ./.gradle
+        key: ${{ runner.os }}-gradle-file
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build with Gradle