Bump highlightjs

Gemfile

@@ -104,7 +104,7 @@ source "https://rails-assets.org" do
   gem "rails-assets-markdown-it--markdown-it-for-inline", "0.1.1"
   gem "rails-assets-markdown-it-sub",                     "1.0.0"
   gem "rails-assets-markdown-it-sup",                     "1.0.0"
-  gem "rails-assets-highlightjs",                         "9.6.0"
+  gem "rails-assets-highlightjs",                         "9.7.0"
   gem "rails-assets-bootstrap-markdown",                  "2.10.0"
 
   # jQuery plugins

Gemfile.lock

@@ -657,7 +657,7 @@ GEM
       rails-assets-jquery.ui (~> 1.11.4)
     rails-assets-emojione (2.0.1)
     rails-assets-favico.js (0.3.10)
-    rails-assets-highlightjs (9.6.0)
+    rails-assets-highlightjs (9.7.0)
     rails-assets-jasmine (2.4.1)
     rails-assets-jasmine-ajax (3.2.0)
       rails-assets-jasmine (~> 2)
@@ -1002,7 +1002,7 @@ DEPENDENCIES
   rails-assets-blueimp-gallery (= 2.21.3)!
   rails-assets-bootstrap-markdown (= 2.10.0)!
   rails-assets-diaspora_jsxc (= 0.1.5.develop.7)!
-  rails-assets-highlightjs (= 9.6.0)!
+  rails-assets-highlightjs (= 9.7.0)!
   rails-assets-jasmine-ajax (= 3.2.0)!
   rails-assets-jquery (= 2.2.4)!
   rails-assets-jquery-placeholder (= 2.3.1)!