ci: Pin uv version installed by setup-uv

Author: nikobockerman

.github/actions/uv-project-setup/action.yaml

@@ -7,6 +7,7 @@ runs:
       id: setup-uv
       uses: astral-sh/setup-uv@1edb52594c857e2b5b13128931090f0640537287 # v5
       with:
+        version: 0.6.2
         python-version: 3.13
     - name: Install project dependencies
       run: uv sync