Fix Bug Risk category

These are incorrect, they should have spaces.

Author: gdiggs

lib/cc/engine/category_parser.rb

@@ -17,8 +17,8 @@ def category
         "Lint/Eval" => "Security",
         "Metrics" => "Complexity",
         "Metrics/LineLength" => "Style",
-        "Performance" => "BugRisk",
-        "Rails" => "BugRisk",
+        "Performance" => "Bug Risk",
+        "Rails" => "Bug Risk",
         "Rails/ActionFilter" => "Style",
         "Rails/Delegate" => "Clarity",
         "Rails/HasAndBelongsToMany" => "Style",

spec/cc/engine/category_parser_spec.rb

@@ -12,7 +12,7 @@ module CC::Engine
     it "returns the category mapped to the cop category if present" do
       category_parser = CategoryParser.new("Rails/ScopeArgs")
 
-      expect(category_parser.category).to eq("BugRisk")
+      expect(category_parser.category).to eq("Bug Risk")
     end
 
     it "returns Style as the default" do