Build(deps-dev): Bump mocha from 2.6.1 to 2.7.1 (#30189)

* Build(deps-dev): Bump mocha from 2.6.1 to 2.7.1

Bumps [mocha](https://github.com/freerange/mocha) from 2.6.1 to 2.7.1.
- [Changelog](https://github.com/freerange/mocha/blob/main/RELEASE.md)
- [Commits](https://github.com/freerange/mocha/compare/v2.6.1...v2.7.1)

---
updated-dependencies:
- dependency-name: mocha
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

* DEV: Fix spec

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Martin Brennan <martin@discourse.org>

Gemfile.lock

@@ -254,7 +254,7 @@ GEM
       ffi (~> 1.9)
     minio_runner (0.1.2)
     minitest (5.25.4)
-    mocha (2.6.1)
+    mocha (2.7.1)
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.5)
     multi_json (1.15.0)

plugins/chat/spec/serializer/chat/channel_serializer_spec.rb

@@ -108,7 +108,10 @@ describe Chat::ChannelSerializer do
 
       it "does not get the kick_message_bus_last_id" do
         MessageBus.expects(:last_id).at_least_once
-        MessageBus.expects(:last_id).never
+        MessageBus
+          .expects(:last_id)
+          .with(Chat::Publisher.kick_users_message_bus_channel(chat_channel.id))
+          .never
         expect(serializer.as_json[:meta][:message_bus_last_ids].key?(:kick)).to eq(false)
       end
     end