Fix double counting of Faraday spans when using net_http_persistent adapter

Author: Robert Looby

sentry-ruby/lib/sentry/faraday.rb

@@ -14,7 +14,7 @@ def initialize(url = nil, options = nil)
 
         # Ensure that we attach instrumentation only if the adapter is not net/http
         # because if is is, then the net/http instrumentation will take care of it
-        if builder.adapter.name != "Faraday::Adapter::NetHttp"
+        if !builder.adapter.name.start_with?("Faraday::Adapter::NetHttp")
           # Make sure that it's going to be the first middleware so that it can capture
           # the entire request processing involving other middlewares
           builder.insert(0, ::Faraday::Request::Instrumentation, name: OP_NAME, instrumenter: Instrumenter.new)