Merge pull request #139 from scala/backport-lts-3.3-22066

Backport "Bump webrick from 1.8.2 to 1.9.1 in /docs/_spec" to 3.3 LTS

Author: tgodzik

docs/_spec/Gemfile.lock

@@ -41,7 +41,7 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    webrick (1.8.2)
+    webrick (1.9.1)
 
 PLATFORMS
   ruby