fix(ruby): Fix trace_sampler examples to use new op (#5787)

Author: sl0thentr0py

src/platform-includes/performance/traces-sampler-as-filter/ruby.mdx

@@ -13,7 +13,7 @@ Sentry.init do |config|
     transaction_name = transaction_context[:name]
 
     case op
-    when /request/
+    when /http/
       case transaction_name
       when /health_check/
         0.0 # ignore health_check requests

src/platform-includes/performance/traces-sampler-as-sampler/ruby.mdx

@@ -18,7 +18,7 @@ Sentry.init do |config|
     transaction_name = transaction_context[:name]
 
     case op
-    when /request/
+    when /http/
       # for Rails applications, transaction_name would be the request's path (env["PATH_INFO"]) instead of "Controller#action"
       case transaction_name
       when /health_check/