gh-36648: CI macOS: Update
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Fixes failure seen in https://github.com/sagemath/sage/actions/runs/6700
323362/job/18206090971:
```
Error: Your Xcode (11.7 =>
/Applications/Xcode_11.7.app/Contents/Developer) is too outdated.
Please update to Xcode 13.2.1 (or delete it).
```
Makes the "dist" job work correctly when pushing a non-annotated tag,
fixing a failure seen in https://github.com/mkoeppe/sage/actions/runs/67
57396979/job/18367916600#step:5:11
Workflow run with this PR:
https://github.com/mkoeppe/sage/actions/runs/6757935604
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URL: https://github.com/sagemath/sage/pull/36648
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee
