fix ci.yml

Author: aDudko

.github/workflows/ci.yml

@@ -25,6 +25,9 @@ jobs:
       - name: Build with Maven
         run: mvn -B clean verify
 
+      - name: Generate Javadoc
+        run: mvn javadoc:javadoc
+
       - name: Upload Javadoc to GitHub Pages
         if: github.ref == 'refs/heads/master'
         run: |