Fixed some typos in CONTRIBUTORS.md (#948)

Author: chaitanyamogal

doc/CONTRIBUTORS.md

@@ -10,7 +10,7 @@ If you've already contributed to other open source projects, contributing to the
 Getting and maintaining a local copy of the source code
 -------------------------------------------------------
 
-There are lots of different ways to use git, and it's so easy to get into a messy state that [there's a comic about it](https://xkcd.com/1597/).  So... if you get stuck, remember, even experieneced programmers somtimes just delete their trees and copy over the stuff they want manually.  
+There are lots of different ways to use git, and it's so easy to get into a messy state that [there's a comic about it](https://xkcd.com/1597/).  So... if you get stuck, remember, even experienced programmers sometimes just delete their trees and copy over the stuff they want manually.  
 
 If you're planning to contribute, first you'll want to [get a local copy of the source code (also known as "cloning the repository")](https://help.github.com/en/github/creating-cloning-and-archiving-repositories/cloning-a-repository)
 
@@ -32,10 +32,10 @@ To make a fork on github, read the instructions at [Fork a repo](https://help.gi
 
 
 ## Style Guide for cve-bin-tool
-This list contains all the style guide that one must follow while contributing so that code is consistent and maintaiable.
+This list contains all the style guide that one must follow while contributing so that code is consistent and maintainable.
 
 ### String Formatting
-Python provide many different ways to format the string(you can read about them [here](https://realpython.com/python-formatted-output/))and we use f-string formatting in our tool.
+Python provides many different ways to format the string(you can read about them [here](https://realpython.com/python-formatted-output/))and we use f-string formatting in our tool.
 
 **Note: As f-strings are only supported in python 3.6+. Please make sure you have version >=3.6**