fix(docs): paginationlink component without paginationitem component

[sfsajid91]

PaginationLink component already wrapped with PaginationItem, so following the existing docs of pagination throws a hydration error in NextJs. A li doesn't need to be wrapped with a li. So the docs needs to be updated.

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[shadcn]

@sfsajid91 We fixed this in https://github.com/shadcn-ui/ui/pull/2190. I'm going to close this one but feel free to reopen if you have any questions. Thanks for the PR. Appreciate it.