fix(ruby): add missing `-run` in `rserver` alias (#11913)

plugins/ruby/ruby.plugin.zsh

@@ -23,4 +23,4 @@ alias gel="gem lock"
 alias geo="gem open"
 alias geoe="gem open -e"
 alias rrun="ruby -e"
-alias rserver="ruby -e httpd . -p 8080" # requires webrick
+alias rserver="ruby -run -e httpd . -p 8080" # requires webrick