Fix formatting of notice in README.md

Author: jacobshirley

README.md

@@ -2,7 +2,7 @@
 
 Bazel rules for managing documentation and static site generation.
 
-> **Notice:** > _This package is in alpha (< 1.0) and the API may change without notice until it reaches a stable release._
+> **Notice:** _This package is in alpha (< 1.0) and the API may change without notice until it reaches a stable release._
 
 ## Features