Bump jupyter-server from 1.13.2 to 1.15.4 in /commons

Bumps [jupyter-server](https://github.com/jupyter/jupyter_server) from 1.13.2 to 1.15.4.
- [Release notes](https://github.com/jupyter/jupyter_server/releases)
- [Changelog](https://github.com/jupyter-server/jupyter_server/blob/main/CHANGELOG.md)
- [Commits](jupyter-server/jupyter_server@v1.13.2...v1.15.4)

---
updated-dependencies:
- dependency-name: jupyter-server
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

commons/requirements.22.03.txt

@@ -250,7 +250,7 @@ jupyter-nbextensions-configurator==0.4.1
 jupyter-packaging==0.11.1
 jupyter-server-mathjax==0.2.5
 jupyter-server-proxy==1.5.2
-jupyter-server==1.13.2
+jupyter-server==1.15.4
 jupyter-telemetry==0.1.0
 jupyter==1.0.0
 jupyterhub-jwtauthenticator==0.1

commons/requirements.22.06.txt

@@ -223,7 +223,7 @@ jupyter-nbextensions-configurator==0.4.1
 jupyter-packaging==0.11.1
 jupyter-server-mathjax==0.2.5
 jupyter-server-proxy==1.5.2
-jupyter-server==1.13.2
+jupyter-server==1.15.4
 jupyter-telemetry==0.1.0
 jupyter==1.0.0
 jupyterhub-jwtauthenticator==0.1