chore(ruby): update gemrc config file

gemrc

@@ -1,8 +1,10 @@
 ---
-:benchmark: false
 :backtrace: false
-:update_sources: true
-:verbose: true
 :bulk_threshold: 1000
 :sources:
-- https://rubygems.org/
+  - https://rubygems.org/
+:update_sources: true
+:verbose: true
+:concurrent_downloads: 8
+benchmark: false
+gem: "--document=yri"