Bump jupyterlab from 4.4.5 to 4.4.8 in /site (#6)

---
updated-dependencies:
- dependency-name: jupyterlab
  dependency-version: 4.4.8
  dependency-type: direct:production
...

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site/requirements.txt

@@ -1,4 +1,4 @@
 jupyterlite-core==0.6.4
-jupyterlab==4.4.5
+jupyterlab==4.4.8
 notebook==7.4.5
 jupyterlite-pyodide-kernel==0.6.1