build(deps): bump leptos_actix from 0.4.10 to 0.5.1

Bumps [leptos_actix](https://github.com/leptos-rs/leptos) from 0.4.10 to 0.5.1.
- [Release notes](https://github.com/leptos-rs/leptos/releases)
- [Commits](https://github.com/leptos-rs/leptos/commits/v0.5.1)

---
updated-dependencies:
- dependency-name: leptos_actix
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>