Create challenge_14.md

Signed-off-by: Rishav986 <[email protected]>

Author: shivaylamba

Challenges/challenge_14.md

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+## Welcome to Challenge 14
+
+Welcome to the 14th Challenge 
+
+Today is the first part of the two challenges related to resolving merge conflicts. You can take a look at [this article](https://www.atlassian.com/git/tutorials/using-branches/merge-conflicts) to learn more about merge conflicts. 
+
+As part of the challenge, try to create a scenario of a merge conflict locally in your system for a project that you can create. 
+
+Task: 
+1. Follow the article shared above and try to reproduce a case of merge conflict in your system for a project and try to resolve it 
+2. Share appropriate screenshot in the issue created in the first challenge.