Fix typo

Author: bebound

azure-pipelines.yml

@@ -656,7 +656,7 @@ jobs:
       set -ev
       # Force relink python@3.xx in Homebrew to resolve the conflict with pre-installed python 3.xx on macOS-12 image
       # See: https://github.com/Azure/azure-cli/issues/29054
-      brew unlink python@$3.12 && brew link --overwrite python@$3.12
+      brew unlink python@3.12 && brew link --overwrite python@3.12
       brew unlink python@3.13 && brew link --overwrite python@3.13
       
       # update homebrew to latest version in case the formula is not compatible with the current homebrew version