docs: update invitation link

Author: schmelto

README.md

@@ -30,7 +30,7 @@ contributions guide.](https://github.com/chryz-hub/chryz-hub.github.io/blob/mast
 
 **Note:**
 
-- To be a member of the community, raise an [invitation issue here!](https://github.com/chryz-hub/chryz-hub.github.io/issues/new?assignees=&labels=invite+me+to+the+organisation&template=invitation.md&title=Please+invite+me+to+the+GitHub+Community+Organization)
+- To be a member of the community, raise an [invitation issue here!](https://github.com/chryz-hub/chryz-hub.github.io/issues/new?assignees=&labels=invite+me+to+the+organisation&template=invitation.yml&title=Please+invite+me+to+the+GitHub+Community+Organization)
 
 - To make your first pull request [click here](https://github.com/chryz-hub/opensource-4-everyone/blob/master/My-PR-Contribution-Practice.md)!