Typo in maintainers guide

Minor typo correction in the maintainer's guide

Signed-off-by: cb-manick <[email protected]>

Author: manick02

maintainer_guidelines.md

@@ -16,7 +16,7 @@ Here are a few tips for repository maintainers.
 
 ## Branch Management
 
-The `main` branch is is the bleeding edge. New major versions of the module
+The `main` branch is the bleeding edge. New major versions of the module
 are cut from this branch and tagged. If you intend to submit a pull request
 you should use `main HEAD` as your starting point.