ZOOKEEPER-4411: [PATCH] improve the grammar issue in the README.md

I'm not sure if I corrected the sentence correctly, so this might be an incorrect interpretation.

Author: fredster33 <64927044+fredster33@users.noreply.github.com>

Reviewers: Christopher Tubbs <ctubbsii@apache.org>, maoling <maoling@apache.org>

Closes #1632 from fredster33/patch-1 and squashes the following commits:

452379fa7 [fredster33] Accept change
4a0bceab3 [fredster33] Grammar fix

README.md

@@ -45,7 +45,7 @@ If you are going to compile with Java 1.8, you should use a
 recent release at u211 or above.
 
 # Contributing
-We always welcome new contributors to the project! See [How to Contribute](https://cwiki.apache.org/confluence/display/ZOOKEEPER/HowToContribute) for details on how to submit patch through pull request and our contribution workflow.
+We always welcome new contributors to the project! See [How to Contribute](https://cwiki.apache.org/confluence/display/ZOOKEEPER/HowToContribute) for details on how to submit patches as pull requests and other aspects of our contribution workflow.
 
 
 [ciBadge]: https://github.com/apache/zookeeper/workflows/CI/badge.svg