ensure pip and uv are both installed

Author: timkpaine

setup/action.yml

@@ -57,5 +57,7 @@ runs:
 
     - name: Install uv as a python package for use of `python -m uv`
       shell: bash
-      run: python -m pip install uv
+      run: |
+        uv pip install pip
+        python -m pip install uv
       if: ${{ inputs.uv == 'true' }}