* Added relevant resources to learn the topic and changed the list of CPU scheduling algorithms
Multilevel Feedback Queue Scheduling Algorithm was present twice in the list. Removed the lines containing the duplicate.
Added HRRN (Highest Response Ratio Next) Algorithm in the list because it is a highly optimised and important CPU Scheduling Algorithm.
* Added video resource for processes and threads
* Restructured the Resource links based on Contributing.md
Debajyati Dey
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