Add a scheduled workflow to automatically update the pixilock file (#8)

* Update `pixi` lockfile in CI

* Use uniquely named branches when opening PRs

* Install `pixi-diff-to-markdown` via `pixi`

.github/workflows/update_pixi_lockfile.yml

@@ -45,4 +45,4 @@ jobs:
           base: main
           labels: pixi
           add-paths: pixi.lock
-          delete-branch: true
+          delete-branch: true