Bump webmock from 3.7.1 to 3.7.3 (mastodon#11853)

Bumps [webmock](https://github.com/bblimke/webmock) from 3.7.1 to 3.7.3.
- [Release notes](https://github.com/bblimke/webmock/releases)
- [Changelog](https://github.com/bblimke/webmock/blob/master/CHANGELOG.md)
- [Commits](bblimke/webmock@v3.7.1...v3.7.3)

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

Author: dependabot-preview[bot]

Gemfile.lock

@@ -646,7 +646,7 @@ GEM
     uniform_notifier (1.12.1)
     warden (1.2.8)
       rack (>= 2.0.6)
-    webmock (3.7.1)
+    webmock (3.7.3)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)