I have corrected some grammatical errors in the Ocaml docs

[sanjana-98]

Issue Description

There was a small grammatical error in the Ocaml docs

Please include a summary of the issue. I added some meaningful text and also changed small letter to caps for some words

Fixes # (issue) original: A good familiarity with programming in a conventional languages (say, C or Java) is assumed what I changed: A good familiarity with programming in any of the conventional languages (say, C or Java) is assumed

Changes Made

Please describe the changes that you made.

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