Added the Longest Common Subsequence problem in C

[Anurag-Nayak]

Pull Request Template

What have you Changed(must)

Added the Longest Common Subsequence problem in C to the Dynamic-Programming folder of Algorithms for C language. And also modified the readme.md file in the Dynamic-Programming folder and added the information about the added LCS problem.

Issue no.(must) - #886

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Self Check(Tick After Making pull Request)

• This issue was assigned to me if not it will marked as spam.
• My file is in proper folder.
• I am following clean code and Documentation.
• I have added title and what program will do first in the file.

README - How to Contribute

[Anurag-Nayak]

Hey,
In my hactoberfest profile, it's showing that this project is not participating. Please could you help me in understanding why is it showing like that? Is the project actually not participating? Please clarify.