enable GPG v2

Author: zarthross

Diff for: .github/workflows/release.yml

@@ -19,6 +19,7 @@ jobs:
     - uses: actions/checkout@v2
       with:
         fetch-depth: 0
+    - uses: olafurpg/setup-gpg@v2
     - name: Set up JDK ${{ matrix.java }}
       uses: actions/setup-java@v1
       with: