Bump webmock from 3.11.2 to 3.12.1

Bumps [webmock](https://github.com/bblimke/webmock) from 3.11.2 to 3.12.1.
- [Release notes](https://github.com/bblimke/webmock/releases)
- [Changelog](https://github.com/bblimke/webmock/blob/master/CHANGELOG.md)
- [Commits](bblimke/webmock@v3.11.2...v3.12.1)

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

Gemfile.lock

@@ -567,7 +567,7 @@ GEM
     webfinger (1.1.0)
       activesupport
       httpclient (>= 2.4)
-    webmock (3.11.2)
+    webmock (3.12.1)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)