Fix issue in publishing action

Author: dnl50

.github/workflows/publish.yml

@@ -22,7 +22,7 @@ jobs:
         uses: gradle/gradle-build-action@v2
 
       - name: Build JAR
-        run: ./gradlew -PprojectVersion="${GITHUB_REF##*/v}" build
+        run: ./gradlew -PprojectVersion="${GITHUB_REF##*/}" build
 
       - name: Log in to Docker Hub
         uses: docker/login-action@v2