doc: remove note highlighting in GOVERNANCE doc

Incorporate note into main text.

PR-URL: https://github.com/nodejs/node/pull/13420
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

GOVERNANCE.md

@@ -24,10 +24,9 @@ maintained by the CTC and additional Collaborators who are added by the
 CTC on an ongoing basis.
 
 Individuals identified by the CTC as making significant and valuable
-contributions are made Collaborators and given commit access to the project.
-
-_Note:_ If you make a significant contribution and are not considered
-for commit access, log an issue or contact a CTC member directly.
+contributions are made Collaborators and given commit access to the project. If
+you make a significant contribution and are not considered for commit access,
+log an issue or contact a CTC member directly.
 
 Modifications of the contents of the nodejs/node repository are made on
 a collaborative basis. Anybody with a GitHub account may propose a