Bump form_urlencoded from 1.2.0 to 1.2.1

Bumps [form_urlencoded](https://github.com/servo/rust-url) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/servo/rust-url/releases)
- [Commits](servo/rust-url@v1.2.0...v1.2.1)

---
updated-dependencies:
- dependency-name: form_urlencoded
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>