Update Rust crate sitemap-rs to v0.2.2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
sitemap-rs (source)	dependencies	patch	0.2.1 -> 0.2.2

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Release Notes

goddtriffin/sitemap-rs (sitemap-rs)

### [`v0.2.2`](https://redirect.github.com/goddtriffin/sitemap-rs/releases/tag/v0.2.2) [Compare Source](https://redirect.github.com/goddtriffin/sitemap-rs/compare/v0.2.1...v0.2.2) - Bump MSRV to 1.81. - Bump all dependency versions to latest. **Full Changelog**: https://github.com/goddtriffin/sitemap-rs/compare/v0.2.1...v0.2.2

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