[llvm] [libc++][CI] Pin the XCode version. (PR #135412)

[via llvm-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {darker}-->


:warning: Python code formatter, darker found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
darker --check --diff -r HEAD~1...HEAD libcxx/test/libcxx/feature_test_macro/is_implemented.sh.py bolt/test/link_fdata.py libcxx/test/libcxx/feature_test_macro/implemented_ftms.sh.py libcxx/utils/generate_feature_test_macro_components.py lldb/test/API/macosx/thread_start_bps/TestBreakpointsThreadInit.py mlir/utils/generate-test-checks.py
``````````

</details>

<details>
<summary>
View the diff from darker here.
</summary>

``````````diff
--- libcxx/utils/generate_feature_test_macro_components.py	2025-04-12 13:07:23.000000 +0000
+++ libcxx/utils/generate_feature_test_macro_components.py	2025-04-12 13:09:58.377989 +0000
@@ -2211,15 +2211,17 @@
         """Has the FTM `ftm` been implemented in the dialect `std`?"""
 
         # When a paper for C++20 has not been implemented in libc++, then there will be no
         # FTM entry in implemented_ftms for C++23 and later. Similarly, a paper like <format>
         # has no entry in standard_ftms for e.g. C++11.
-        if not std in self.implemented_ftms[ftm].keys() or not std in self.standard_ftms[ftm].keys():
+        if (
+            not std in self.implemented_ftms[ftm].keys()
+            or not std in self.standard_ftms[ftm].keys()
+        ):
             return False
 
         return self.implemented_ftms[ftm][std] == self.standard_ftms[ftm][std]
-
 
     @functools.cached_property
     def ftm_metadata(self) -> Dict[Ftm, Metadata]:
         """Returns the metadata of the FTMs defined in the Standard.
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/135412