field manageability reversion

Author: dschach

trigger-actions-framework/main/default/objects/sObject_Trigger_Setting__mdt/fields/TriggerRecord_Class_Name__c.field-meta.xml

@@ -5,7 +5,7 @@
         and `recordPrior`. Both of these variables need to match the SObject type for this SObject
         Trigger Setting record.</description>
     <externalId>false</externalId>
-    <fieldManageability>DeveloperControlled</fieldManageability>
+    <fieldManageability>SubscriberControlled</fieldManageability>
     <inlineHelpText>Enter the API name of a global class which extends `TriggerRecord` and contains two global properties: `record`
         and `recordPrior`. Both of these variables need to match the SObject type for this SObject
         Trigger Setting record.</inlineHelpText>