Fix: minor typo (#360)

Fix: minor typo

CONTRIBUTING.md

@@ -43,7 +43,7 @@ happens and under which conditions it normally happens.
 suggested. If it has, add a comment to the existing issue instead of opening a new one.
 
 #### How Do I Submit A (Good) Enhancement Suggestion?
-Enhancement suggestions are tracked as GitHub issues. Create an issue on and provide 
+Enhancement suggestions are tracked as GitHub issues. Create an issue and provide 
 the following information:
 
 * Use a **clear and descriptive title** for the issue to identify the suggestion.
@@ -65,4 +65,4 @@ If these checks pass, pull requests will be reviewed by the project team against
 * changes that are solely formatting are likely to be rejected
 
 Always write a clear log message for your commits. One-line messages are fine for small changes, but 
-bigger changes should contain more detail.
+bigger changes should contain more detail.