chore: Added code comment to the macos-26-intel pinned change

Author: rahulkanneri-2u

.github/workflows/cli-tests.yml

@@ -25,6 +25,8 @@ jobs:
           - name: linux
             image: ubuntu-latest
           - name: mac
+            # Pin to GitHub's Intel macOS runner because this Docker/Colima job
+            # fails on arm64 macOS runners, including macos-latest.
             image: macos-26-intel
         python-version:
           - '3.11'