Merge pull request #310 from ohbarye/dependabot/bundler/backend/websocket-extensions-0.1.5

[Security] Bump websocket-extensions from 0.1.4 to 0.1.5 in /backend

Author: ohbarye

backend/Gemfile.lock

@@ -170,7 +170,7 @@ GEM
       railties (>= 6.0.0)
     websocket-driver (0.7.2)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.4)
+    websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
     zeitwerk (2.3.0)