Bump websocket-extensions from 0.1.4 to 0.1.5

Bumps [websocket-extensions](https://github.com/faye/websocket-extensions-ruby) from 0.1.4 to 0.1.5.
- [Release notes](https://github.com/faye/websocket-extensions-ruby/releases)
- [Changelog](https://github.com/faye/websocket-extensions-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/faye/websocket-extensions-ruby/compare/0.1.4...0.1.5)

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -99,7 +99,7 @@ GEM
       pry (>= 0.9.10, < 0.13.0)
     puma (4.1.0)
       nio4r (~> 2.0)
-    rack (2.2.3)
+    rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (6.0.0)
@@ -170,7 +170,7 @@ GEM
     unicode-display_width (1.6.0)
     websocket-driver (0.7.1)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.4)
+    websocket-extensions (0.1.5)
     zeitwerk (2.1.10)
 
 PLATFORMS