Fixed CI, removed python 3.9

Author: 3coins

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
         rm -rf "jupyter_ai_tools"
 
     - name: Upload artifact
-      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.9'
+      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.10'
       uses: actions/upload-artifact@v4
       with:
         name: my_server_extension-sdist
@@ -99,7 +99,7 @@ jobs:
     - name: Install Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.9'
+        python-version: '3.10'
         architecture: 'x64'
     - uses: actions/download-artifact@v4
       with: