aws/credentials/plugincreds: Fixup plugin comment
//
// Plugin Symbol Name
//
-// See ProviderSymbolName for the symbol named that will be used to lookup the
-// credentials plugin provider. If you want to use a custom symbol name you
-// should use GetPluginProviderFnsByName to lookup the symbol by a custom name.
+// The "GetAWSSDKCredentialProvider" is the symbol name that will be used to
+// lookup the credentials provider getter from the plugin. If you want to use a
+// custom symbol name you should use GetPluginProviderFnsByName to lookup the
+// symbol by a custom name.
//
// This symbol is a function that returns two additional functions. One to
// retrieve the credentials, and another to determine if the credentials have
