Bump gunicorn in /applications/rag/frontend/container

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 22.0.0 to 23.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@22.0.0...23.0.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

applications/rag/frontend/container/requirements.txt

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 Flask==3.0.0
-gunicorn==22.0.0
+gunicorn==23.0.0
 Werkzeug==3.0.6
 langchain==0.3.14
 langchain-community==0.3.14