Bump rugments to v1.0.0beta8 to fix C prototype function highlighting

Closes #1890

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 v 7.13.0 (unreleased)
+  - Bump rugments to 1.0.0beta8 to fix C prototype function highlighting (Jonathon Reinhart)
   - Fix Merge Request webhook to properly fire "merge" action when accepted from the web UI
   - Add `two_factor_enabled` field to admin user API (Stan Hu)
   - Fix invalid timestamps in RSS feeds (Rowan Wookey)

Gemfile

@@ -267,4 +267,4 @@ end
 gem "newrelic_rpm"
 gem 'octokit', '3.7.0'
-gem "rugments", "~> 1.0.0.beta7"
+gem "rugments", "~> 1.0.0.beta8"

Gemfile.lock

@@ -565,7 +565,7 @@ GEM
     rubyntlm (0.5.0)
     rubypants (0.2.0)
     rugged (0.22.2)
-    rugments (1.0.0.beta7)
+    rugments (1.0.0.beta8)
     safe_yaml (1.0.4)
     sanitize (2.1.0)
       nokogiri (>= 1.4.4)
@@ -821,7 +821,7 @@ DEPENDENCIES
   rqrcode-rails3
   rspec-rails (~> 3.3.0)
   rubocop (= 0.28.0)
-  rugments (~> 1.0.0.beta7)
+  rugments (~> 1.0.0.beta8)
   sanitize (~> 2.0)
   sass-rails (~> 4.0.2)
   sdoc