ci: disable locked mode for pixi install

Allow lock file updates in CI since the lock file may be stale.

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: dimitri-yatsenko

.github/workflows/test.yaml

@@ -34,6 +34,7 @@ jobs:
         uses: prefix-dev/[email protected]
         with:
           cache: true
+          locked: false
 
       - name: Run tests
         run: pixi run -e test test-cov
@@ -48,6 +49,7 @@ jobs:
         uses: prefix-dev/[email protected]
         with:
           cache: true
+          locked: false
 
       - name: Run unit tests
         run: pixi run -e test pytest tests/unit -v