Update CONTRIBUTING.md

Author: tinyg210

CONTRIBUTING.md

@@ -11,7 +11,7 @@ information to effectively respond to your bug report or contribution.
 
 We welcome you to use the GitHub issue tracker to report bugs or suggest features.
 
-When filing an issue, please check existing open, or recently closed, issues to make sure somebody else hasn't already
+When filing an issue, please check existing open or recently closed issues to make sure somebody else hasn't already
 reported the issue. Please try to include as much information as you can. Details like these are incredibly useful:
 
 * A reproducible test case or series of steps
@@ -21,11 +21,11 @@ reported the issue. Please try to include as much information as you can. Detail
 
 
 ## Contributing via Pull Requests
-Contributions via pull requests are much appreciated. Before sending us a pull request, please ensure that:
+Contributions via pull requests are much appreciated. Before sending us a pull request, please ensure the following:
 
-1. You are working against the latest source on the *master* branch.
-2. You check existing open, and recently merged, pull requests to make sure someone else hasn't addressed the problem already.
-3. You open an issue to discuss any significant work - we would hate for your time to be wasted.
+1. You are working against the latest source on the *main* branch.
+2. You check existing open and recently merged pull requests to make sure someone else hasn't addressed the problem already.
+3. You open an issue to discuss any significant work - we would hate to waste your time.
 
 To send us a pull request, please:
 
@@ -36,7 +36,7 @@ To send us a pull request, please:
 5. Send us a pull request, answering any default questions in the pull request interface.
 6. Pay attention to any automated CI failures reported in the pull request, and stay involved in the conversation.
 
-GitHub provides additional document on [forking a repository](https://help.github.com/articles/fork-a-repo/) and
+GitHub provides additional documents on [forking a repository](https://help.github.com/articles/fork-a-repo/) and
 [creating a pull request](https://help.github.com/articles/creating-a-pull-request/).
 
 
@@ -45,17 +45,10 @@ Looking at the existing issues is a great way to find something to contribute on
 
 
 ## Code of Conduct
-This project has adopted the [Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct).
-For more information see the [Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact
-opensource-codeofconduct@amazon.com with any additional questions or comments.
-
-
-## Security issue notifications
-If you discover a potential security issue in this project we ask that you notify AWS/Amazon Security via our [vulnerability reporting page](http://aws.amazon.com/security/vulnerability-reporting/). Please do **not** create a public github issue.
+Please review the adopted [code of conduct](CODE_OF_CONDUCT.md) and make sure you follow the guidelines.
 
 
 ## Licensing
 
-See the [LICENSE](LICENSE) file for our project's licensing. We will ask you to confirm the licensing of your contribution.
+See the [LICENSE](LICENSE) file for our project's licensing. By contributing, you agree that your contributions will be licensed under the existing license.
 
-We may ask you to sign a [Contributor License Agreement (CLA)](http://en.wikipedia.org/wiki/Contributor_License_Agreement) for larger changes.