Fix typo in git.bzl

arbitary -> arbitrary

Closes #22235.

PiperOrigin-RevId: 631849045
Change-Id: Ic4531e9c78a2dd980054ae4bf9b8ad88ded78519
diff --git a/tools/build_defs/repo/git.bzl b/tools/build_defs/repo/git.bzl
index c9823b0..9bc25ff 100644
--- a/tools/build_defs/repo/git.bzl
+++ b/tools/build_defs/repo/git.bzl
@@ -83,7 +83,7 @@
             "always be cloned with --depth=1). Setting such a date close to " +
             "the specified commit may allow for a shallow clone of the " +
             "repository even if the server does not support shallow fetches " +
-            "of arbitary commits. Due to bugs in git's --shallow-since " +
+            "of arbitrary commits. Due to bugs in git's --shallow-since " +
             "implementation, using this attribute is not recommended as it " +
             "may result in fetch failures.",
     ),