Merge pull request github#676 from github/dependabot/bundler/html-proofer-3.9.2

Bump html-proofer from 3.9.1 to 3.9.2

Author: talsafran

Gemfile.lock

@@ -84,7 +84,7 @@ GEM
     html-pipeline (2.8.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    html-proofer (3.9.1)
+    html-proofer (3.9.2)
       activesupport (>= 4.2, < 6.0)
       addressable (~> 2.3)
       colorize (~> 0.8)