Add GPG private key configuration to CI workflow

Author: Mirzoxid

.github/workflows/ci.yml

@@ -15,6 +15,7 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: '17'
+          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
 
       - name: Make mvnw executable
         run: chmod +x mvnw