Bump ruby-openai to fix warning

Author: fbacall

Gemfile.lock

@@ -660,7 +660,7 @@ GEM
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.29.0)
       parser (>= 3.2.1.0)
-    ruby-openai (7.3.1)
+    ruby-openai (8.3.0)
       event_stream_parser (>= 0.3.0, < 2.0.0)
       faraday (>= 1)
       faraday-multipart (>= 1)