Bump labkit-ruby gem version

This version removes the 6.1 rails restriction

Gemfile

@@ -309,7 +309,7 @@ gem 'pg_query', '~> 1.3.0'
 gem 'premailer-rails', '~> 1.10.3'
 
 # LabKit: Tracing and Correlation
-gem 'gitlab-labkit', '0.13.5'
+gem 'gitlab-labkit', '0.14.0'
 
 # I18n
 gem 'ruby_parser', '~> 3.15', require: false

Gemfile.lock

@@ -432,9 +432,9 @@ GEM
       fog-json (~> 1.2.0)
       mime-types
       ms_rest_azure (~> 0.12.0)
-    gitlab-labkit (0.13.5)
-      actionpack (>= 5.0.0, < 6.1.0)
-      activesupport (>= 5.0.0, < 6.1.0)
+    gitlab-labkit (0.14.0)
+      actionpack (>= 5.0.0, < 7.0.0)
+      activesupport (>= 5.0.0, < 7.0.0)
       gitlab-pg_query (~> 1.3)
       grpc (~> 1.19)
       jaeger-client (~> 1.1)
@@ -1363,7 +1363,7 @@ DEPENDENCIES
   gitlab-chronic (~> 0.10.5)
   gitlab-experiment (~> 0.4.4)
   gitlab-fog-azure-rm (~> 1.0)
-  gitlab-labkit (= 0.13.5)
+  gitlab-labkit (= 0.14.0)
   gitlab-license (~> 1.0)
   gitlab-mail_room (~> 0.0.8)
   gitlab-markup (~> 1.7.1)