Tighten the wording for sending a pull request.

PiperOrigin-RevId: 485036120
(cherry picked from commit 8030a492)

CONTRIBUTING.md

@@ -15,7 +15,7 @@ all of the information requested in the issue template.
 
 
 ## Pull requests ##
 ## Pull requests ##
 
 
-We will also consider high quality pull requests. These should normally merge
+We will also consider high quality pull requests. These should merge
 into the `dev-v2` branch. Before a pull request can be accepted you must submit
 into the `dev-v2` branch. Before a pull request can be accepted you must submit
 a Contributor License Agreement, as described below.
 a Contributor License Agreement, as described below.