docs: add iamshouvikmitra as a contributor

[allcontributors]

Adds @iamshouvikmitra as a contributor for test.

This was requested by chintan9 in this comment

[pull-assistant]

Best reviewed: commit by commit

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Optimal code review plan

     docs: update README.md [skip ci]

     docs: update .all-contributorsrc [skip ci]

     docs: update README.md [skip ci]

     docs: update .all-contributorsrc [skip ci]

     docs: update README.md [skip ci]

     docs: update .all-contributorsrc [skip ci]

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[vizipi]

Pull request analysis by VIZIPI

Below you will find who is the most qualified team member to review your code.
This analysis includes his/her work on the code included in this Pull request, in addition to their experience in code affected by these changes ( partly found within the list of potential missing files below )   Feedback always welcome

Reviewers with knowledge related to these changes

Match %	Person	Commit Count	Common Files
100.00 %	Chintan Prajapati	51	1
100.00 %	Takeshi Iwana	5	1

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Potential missing files from this Pull request

No commonly committed files found with a 40% threashold

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Committed file ranks

(click to expand)

98.72%[README.md]