Add v to 0.3.1

Ugh I'm so stupid part 2

Author: phrdang

.github/workflows/java-checkstyle.yml

@@ -19,7 +19,7 @@ jobs:
         java-version: '12.x'
 
     - name: Run checkstyle with reviewdog
-      uses: nikitasavinov/checkstyle-action@0.3.1
+      uses: nikitasavinov/checkstyle-action@v0.3.1
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         # submit review comments based on reviewdog findings