Make a single action

Author: Andre601

.github/workflows/build_docs.yml

@@ -25,11 +25,7 @@ jobs:
       working-directory: './wiki'
       run: |
         mkdocs build
-  build_javadoc:
-    needs: [build_wiki]
-    if: success()
-    runs-on: ubuntu-latest
-    steps:
+    # Build Javadoc
     - uses: actions/checkout@v2
     - name: Setup Java 8
       uses: actions/setup-java@v1