Apply suggestions from code review

Author: sodabrew

spec/mysql2/client_spec.rb

@@ -484,7 +484,7 @@ def run_gc
   end
 
   it "should set default program_name in connect_attrs" do
-    skip("DON'T WORRY, THIS TEST PASSES - but PERFORMNCE SCHEMA is not enabled in your MySQL daemon.") unless performance_schema_enabled
+    skip("DON'T WORRY, THIS TEST PASSES - but PERFORMANCE SCHEMA is not enabled in your MySQL daemon.") unless performance_schema_enabled
     client = new_client
     if Mysql2::Client::CONNECT_ATTRS.zero? || client.server_info[:version].match(/10.[01].\d+-MariaDB/)
       pending('Both client and server versions must be MySQL 5.6 or MariaDB 10.2 or later.')
@@ -494,7 +494,7 @@ def run_gc
   end
 
   it "should set custom connect_attrs" do
-    skip("DON'T WORRY, THIS TEST PASSES - but PERFORMNCE SCHEMA is not enabled in your MySQL daemon.") unless performance_schema_enabled
+    skip("DON'T WORRY, THIS TEST PASSES - but PERFORMANCE SCHEMA is not enabled in your MySQL daemon.") unless performance_schema_enabled
     client = new_client(connect_attrs: { program_name: 'my_program_name', foo: 'fooval', bar: 'barval' })
     if Mysql2::Client::CONNECT_ATTRS.zero? || client.server_info[:version].match(/10.[01].\d+-MariaDB/)
       pending('Both client and server versions must be MySQL 5.6 or MariaDB 10.2 or later.')