🔧 fix doc workflow (#197)

Author: sebastianMindee

.github/workflows/docs.yml

@@ -37,10 +37,12 @@ jobs:
         run: mvn --update-snapshots --no-transfer-progress javadoc:javadoc
 
       - name: Copy Code Samples
-        run: cp -r ./docs/code_samples ./target/site/apidocs
+        run: |
+          mkdir -p ./target/site/apidocs
+          cp -r ./docs/code_samples ./target/site/apidocs
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./target/site/apidocs