[CI] Bump pixi version

Just staying up to date.

MODULAR_ORIG_COMMIT_REV_ID: 1153b306cdefa280f162dad8907a3b6d98103ac6

Author: Ahajha

.github/workflows/publish.yml

@@ -36,7 +36,7 @@ jobs:
 
       - uses: prefix-dev/setup-pixi@fef5c9568ca6c4ff7707bf840ab0692ba3f08293
         with:
-          pixi-version: v0.63.2
+          pixi-version: v0.71.0
           cache: false
           post-cleanup: false