Update gitlab-sidekiq-fetcher to 0.5.5

Fixes a bug in 0.5.4 that didn't handle namespaced queues

See https://gitlab.com/gitlab-org/sidekiq-reliable-fetch/-/merge_requests/26

Gemfile

@@ -196,7 +196,7 @@ gem 'acts-as-taggable-on', '~> 7.0'
 gem 'sidekiq', '~> 5.2.7'
 gem 'sidekiq-cron', '~> 1.0'
 gem 'redis-namespace', '~> 1.7.0'
-gem 'gitlab-sidekiq-fetcher', '0.5.4', require: 'sidekiq-reliable-fetch'
+gem 'gitlab-sidekiq-fetcher', '0.5.5', require: 'sidekiq-reliable-fetch'
 
 # Cron Parser
 gem 'fugit', '~> 1.2.1'

Gemfile.lock

@@ -451,7 +451,7 @@ GEM
     gitlab-pry-byebug (3.9.0)
       byebug (~> 11.0)
       pry (~> 0.13.0)
-    gitlab-sidekiq-fetcher (0.5.4)
+    gitlab-sidekiq-fetcher (0.5.5)
       sidekiq (~> 5)
     gitlab-styles (6.0.0)
       rubocop (~> 0.91.1)
@@ -1379,7 +1379,7 @@ DEPENDENCIES
   gitlab-markup (~> 1.7.1)
   gitlab-net-dns (~> 0.9.1)
   gitlab-pry-byebug
-  gitlab-sidekiq-fetcher (= 0.5.4)
+  gitlab-sidekiq-fetcher (= 0.5.5)
   gitlab-styles (~> 6.0.0)
   gitlab_chronic_duration (~> 0.10.6.2)
   gitlab_omniauth-ldap (~> 2.1.1)