Remove redundant gradle-build-action step (#436)

Also add a name to clarify that this is only setup.

Author: fwcd

.github/workflows/build.yml

@@ -21,9 +21,9 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: ${{ matrix.java }}
-      - uses: gradle/gradle-build-action@v2
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v2
       - name: Build
         run: ./gradlew :server:build :shared:build -PjavaVersion=${{ matrix.java }}
-      - uses: gradle/gradle-build-action@v2
       - name: Detekt
         run: ./gradlew detekt

.github/workflows/deploy.yml

@@ -15,7 +15,8 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: '11'
-      - uses: gradle/gradle-build-action@v2
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v2
       - name: Build distribution
         run: ./gradlew :server:distZip :grammars:distZip
       - name: Create release