Update docs/skydoc_deprecation.md

Co-Authored-By: Jin <jin@users.noreply.github.com>

docs/skydoc_deprecation.md

diff --git a/docs/skydoc_deprecation.md b/docs/skydoc_deprecation.md
index b9a74d4..d86fc90 100644
--- a/docs/skydoc_deprecation.md
+++ b/docs/skydoc_deprecation.md
@@ -132,6 +132,6 @@
 ## Migration Issues
 
 If you run into any issues migrating, please file a
-[github issue](https://github.com/bazelbuild/stardoc/issues).
+[GitHub issue](https://github.com/bazelbuild/stardoc/issues).