Updated CONTRIBUTING.md

CONTRIBUTING.md

@@ -2,13 +2,13 @@
 
 **Make sure your pull request follows these guidelines:**
 
-- Search through the previous pull requests before making a new one! 
-- Adding new categories, or improving existing categories is welcome!
-- Make sure you've personally used or benefited from the suggested resource.
-- Make an individual pull request for each suggestion.
-- Use the following format: `[Resource Title](url link) — description.`
-- Expand on why the resource is useful in your pull request if needed.
-- Keep descriptions short and simple, but descriptive. 
-- Please double check your spelling and grammar.
+- [x] Search through the previous pull requests before making a new one! 
+- [x] Adding new categories, or improving existing categories is welcome!
+- [x] Make sure you've personally used or benefited from the suggested resource.
+- [x] Make an individual pull request for each suggestion.
+- [x] Use the following format: `[Resource Title](url link) — description.`
+- [x] Expand on why the resource is useful in your pull request if needed.
+- [x] Keep descriptions short and simple, but descriptive. 
+- [x] Please double check your spelling and grammar.
 
 **Thanks for contributing to this Project!**