chore: Update WEBrick to 1.8.1 (#2536)

Author: mattcreaser

scripts/Gemfile.lock

@@ -194,7 +194,7 @@ GEM
       unf_ext
     unf_ext (0.0.7.7)
     unicode-display_width (1.7.0)
-    webrick (1.7.0)
+    webrick (1.8.1)
     word_wrap (1.0.0)
     xcodeproj (1.20.0)
       CFPropertyList (>= 2.3.3, < 4.0)