docs(Dialog): update broken link

[jsiot76]

bad link to Overlay doc

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[codecov]

Codecov Report

Merging #3780 (f8238ae) into next (a8e5327) will not change coverage.
The diff coverage is n/a.

❗ Current head f8238ae differs from pull request most recent head 182855d. Consider uploading reports for the commit 182855d to get more accurate results

@@           Coverage Diff           @@
##             next    #3780   +/-   ##
=======================================
  Coverage   79.39%   79.39%           
=======================================
  Files          87       87           
  Lines        1820     1820           
  Branches      810      810           
=======================================
  Hits         1445     1445           
  Misses        370      370           
  Partials        5        5           

Impacted Files	Coverage Δ
packages/base/src/Dialog/Dialog.tsx	100.00% <ø> (ø)

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