Upgrade Akismet gem to v3.0.0

This upgrade enables SSL by default.

Closes https://gitlab.com/gitlab-org/gitlab/issues/30484

Gemfile

@@ -54,7 +54,7 @@ gem 'gssapi', group: :kerberos
 
 # Spam and anti-bot protection
 gem 'recaptcha', '~> 4.11', require: 'recaptcha/rails'
-gem 'akismet', '~> 2.0'
+gem 'akismet', '~> 3.0'
 gem 'invisible_captcha', '~> 0.12.1'
 
 # Two-factor authentication

Gemfile.lock

@@ -58,7 +58,7 @@ GEM
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
     aes_key_wrap (1.0.1)
-    akismet (2.0.0)
+    akismet (3.0.0)
     apollo_upload_server (2.0.0.beta.3)
       graphql (>= 1.8)
       rails (>= 4.2)
@@ -1120,7 +1120,7 @@ DEPENDENCIES
   activerecord-explain-analyze (~> 0.1)
   acts-as-taggable-on (~> 6.0)
   addressable (~> 2.5.2)
-  akismet (~> 2.0)
+  akismet (~> 3.0)
   apollo_upload_server (~> 2.0.0.beta3)
   asana (~> 0.9)
   asciidoctor (~> 2.0.10)

changelogs/unreleased/sh-upgrade-akismet-gem.yml

+---
+title: Upgrade Akismet gem to v3.0.0
+merge_request: 21786
+author:
+type: security