main.yml: upgrade wrapper-validation-action to v1.0.4

.github/workflows/main.yml

@@ -67,7 +67,7 @@ jobs:
         with:
           fetch-depth: 1
       - name: Validate the Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
+        uses: gradle/wrapper-validation-action@v1.0.4
       - name: Build
         run: |
           ./gradlew -PuseCommitHashAsVersionName=true --no-daemon -PbuildNativeProjects=true \
@@ -121,7 +121,7 @@ jobs:
           path: build/native
 
       - name: Validate the Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
+        uses: gradle/wrapper-validation-action@v1.0.4
       - name: Build Engine
         shell: bash
         run: |