chore(deps): Update gitleaks/gitleaks to v8.21.1

[sscheib]

This PR contains the following updates:

Package	Update	Change
ghcr.io/gitleaks/gitleaks	patch	v8.21.0 -> v8.21.1

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Release Notes

gitleaks/gitleaks (ghcr.io/gitleaks/gitleaks)

### [`v8.21.1`](https://redirect.github.com/gitleaks/gitleaks/releases/tag/v8.21.1) [Compare Source](https://redirect.github.com/gitleaks/gitleaks/compare/v8.21.0...v8.21.1) ##### Changelog - [`cf5334f`](https://redirect.github.com/gitleaks/gitleaks/commit/cf5334f) feat: add curl basic auth rule ([#​1575](https://redirect.github.com/gitleaks/gitleaks/issues/1575)) - [`d07b394`](https://redirect.github.com/gitleaks/gitleaks/commit/d07b394) Update spelling in README.md ([#​1574](https://redirect.github.com/gitleaks/gitleaks/issues/1574)) - [`5c03fa4`](https://redirect.github.com/gitleaks/gitleaks/commit/5c03fa4) refactor(allowlist): use iota for condition ([#​1569](https://redirect.github.com/gitleaks/gitleaks/issues/1569)) - [`12034a7`](https://redirect.github.com/gitleaks/gitleaks/commit/12034a7) refactor(config): temporarily switch to \[rules.allowlist] ([#​1573](https://redirect.github.com/gitleaks/gitleaks/issues/1573))

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