Update webpki-roots requirement from 0.21.0 to 0.22.0

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)

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

Cargo.toml

@@ -50,7 +50,7 @@ version = "0.21.4"
 
 [dependencies.webpki-roots]
 optional = true
-version = "0.21.0"
+version = "0.22.0"
 
 [dev-dependencies]
 env_logger = "0.8.1"