fix(darkthemetoggle): change path for import useIsMounted

[newarifrh]

fix #1182

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If there are breaking API changes - like adding or removing props, or changing the structure of the theme - describe them, and provide steps to update existing code.

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Name	Status	Preview	Comments	Updated (UTC)
flowbite-react	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 12, 2023 3:19pm

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (7461173) 99.54% compared to head (df6695f) 97.36%. Report is 178 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1184 +/- ## ========================================== - Coverage 99.54% 97.36% -2.19% ========================================== Files 163 214 +51 Lines 6621 9070 +2449 Branches 401 534 +133 ========================================== + Hits 6591 8831 +2240 - Misses 30 239 +209 ```

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[newarifrh]

Merged. #1183