Issue#299 Docs: Snippets.md still linking to old documentation.

[BilalAhmed-358]

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The issue stated

https://github.com/ults-io/vscode-react-javascript-snippets/blob/HEAD/docs/Snippets.md

still links to https://reactjs.org/docs/hooks-reference.html

I have replaced the link to old documentation with the link to the latest documentation.