Update webpki-roots requirement from 0.21 to 0.22

Updates the requirements on [webpki-roots](https://github.com/ctz/webpki-roots) to permit the latest version.
- [Release notes](https://github.com/ctz/webpki-roots/releases)
- [Commits](https://github.com/ctz/webpki-roots/compare/v/0.21.0...v/0.22.0)

---
updated-dependencies:
- dependency-name: webpki-roots
  dependency-type: direct:production
...

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

Cargo.toml

@@ -55,7 +55,7 @@ version = "0.21"
 
 [dependencies.webpki-roots]
 optional = true
-version = "0.21"
+version = "0.22"
 
 [dev-dependencies]
 criterion = "0.3.4"