Fixed typo and capitalized some words (TheAlgorithms#900)

File looks more elegant now ;-)

Author: qckzr

CONTRIBUTING.md

@@ -10,10 +10,10 @@ Welcome to [TheAlgorithms/Python](https://github.com/TheAlgorithms/Python)! Befo
 
 We are very happy that you consider implementing algorithms and data structure for others! This repository is referenced and used by learners from all over the globe. Being one of our contributors, you agree and confirm that:
 
-- your did your work - no plagiarism allowed
+- You did your work - no plagiarism allowed
   - Any plagiarized work will not be merged.
-- your work will be distributed under [MIT License](License) once your pull request is merged
-- you submitted work fulfils or mostly fulfils our styles and standards
+- Your work will be distributed under [MIT License](License) once your pull request is merged
+- You submitted work fulfils or mostly fulfils our styles and standards
 
 **New implementation** is welcome! For example, new solutions for a problem, different representations for a graph data structure or algorithm designs with different complexity.
 
@@ -115,8 +115,8 @@ We want your work to be readable by others; therefore, we encourage you to note
 
 - Most importantly,
 
-  - **be consistent with this guidelines while submitting.**
-  - **join** [Gitter](https://gitter.im/TheAlgorithms) **now!**
+  - **Be consistent with this guidelines while submitting.**
+  - **Join** [Gitter](https://gitter.im/TheAlgorithms) **now!**
   - Happy coding!