fix(deps): update dependency decky-frontend-lib to v3.21.8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
decky-frontend-lib	3.21.7 -> 3.21.8

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Release Notes

SteamDeckHomebrew/decky-frontend-lib (decky-frontend-lib)

### [`v3.21.8`](https://togithub.com/SteamDeckHomebrew/decky-frontend-lib/blob/HEAD/CHANGELOG.md#​3218-httpsgithubcomSteamDeckHomebrewdecky-frontend-libcomparev3217v3218-2023-06-27) [Compare Source](https://togithub.com/SteamDeckHomebrew/decky-frontend-lib/compare/v3.21.7...v3.21.8) ##### Bug Fixes - the typescript compiler was eating the enum ([c9b5839](https://togithub.com/SteamDeckHomebrew/decky-frontend-lib/commit/c9b583945c1cb5267b41a821743590a841572abe))

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