chore: Pin pixi

Author: lewisjared

.github/actions/setup/action.yml

@@ -12,9 +12,9 @@ runs:
     - name: Install pixi
       uses: prefix-dev/setup-pixi@v0.8.3
       with:
-        pixi-version: "latest"
+        pixi-version: "0.40.2"
         cache: true
-        log-level: "vvv"
+        log-level: "v"
     - name: Cache downloaded ESGF data
       uses: actions/cache@v4
       if: ${{ inputs.cache-esgf == 'true' }}