[NFC] Inclusive language: Remove instances of master in URLs

[NFC] This patch fixes URLs containing "master". Old URLs were either broken or
redirecting to the new URL.

Reviewed By: #libc, ldionne, mehdi_amini

Differential Revision: https://reviews.llvm.org/D113186
diff --git a/clang/docs/LibFormat.rst b/clang/docs/LibFormat.rst
index 4ea84e6..833f768 100644
--- a/clang/docs/LibFormat.rst
+++ b/clang/docs/LibFormat.rst
@@ -53,7 +53,7 @@
   FormatStyle getGoogleStyle();
 
   /// Returns a format style complying with Chromium's style guide:
-  /// https://chromium.googlesource.com/chromium/src/+/master/styleguide/styleguide.md
+  /// https://chromium.googlesource.com/chromium/src/+/refs/heads/main/styleguide/styleguide.md
   FormatStyle getChromiumStyle();
 
   /// Returns a format style complying with the GNU coding standards: