Update Contributing Guide.md

Author: maximevtush

doc/Contributing Guide.md

@@ -77,12 +77,12 @@ A good principle: "Work together, share ideas, teach others."
 
 ### Sign the CLA
 
-Since the first time you push a PR request as a contributor, you will be asked to sign a CLA (Contributor License Agreement), please following the instruction to comment in such PR.
+Since the first time you push a PR request as a contributor, you will be asked to sign a CLA (Contributor License Agreement), please follow the instruction to comment in such PR.
 
 ### Important Note
 
 Please **don't force push** commits in your branch, in order to keep commit
 history and make it easier for us to see changes between reviews.
 
 Make sure to `Allow edits of maintainers` (under the text box) in the PR so
-people can actually collaborate on things or fix smaller issues themselves.
+people can actually collaborate on things or fix smaller issues themselves.