[libc][docs] Fix outdated code review section, as per #91934

[cyuria]

As in the title, fixes #91934

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@llvm/pr-subscribers-libc

Author: Cyuria (cyuria)

Changes

As in the title, fixes #91934

---

Full diff: https://github.com/llvm/llvm-project/pull/92051.diff

1 Files Affected:

• (modified) libc/src/math/docs/add_math_function.md (+3-2)

diff --git a/libc/src/math/docs/add_math_function.md b/libc/src/math/docs/add_math_function.md
index d1bca222b4286..9c23b8ca789bc 100644
--- a/libc/src/math/docs/add_math_function.md
+++ b/libc/src/math/docs/add_math_function.md
@@ -196,7 +196,8 @@ implementation (which is very often glibc).
 
 ## Code reviews
 
-We follow the code review process of LLVM with Phabricator:
+We use GitHub's inbuilt pull request system for code review:
 ```
-  https://llvm.org/docs/Phabricator.html
+  https://docs.github.com/articles/about-collaborative-development-models
+  https://docs.github.com/articles/about-pull-requests
 ```

[lntue]

Thanks for updating the docs!

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