FIX #1276 Added to the code of longest increasing subsequence in cpp in dynamic programming

[PrakarshSingh5]

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• [x] My addition is on refer on the language README.md file
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What kind of change does this PR introduce? (check at least one)

• [x] Bugfix
• [x] New algorithm
• [x] Optimization in previous algorithms
• [x] Code style update
• [x] Refactor
• [x] Documentation
• [x] Other, please describe:

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