feat(flagpole): Update flagpole documentation with new owner field (#16918)

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## DESCRIBE YOUR PR
The owner field has been changed to separate out the team and email
fields. This updates the documentation to reflect this change.

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## PRE-MERGE CHECKLIST

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Author: kenzoengineer

develop-docs/backend/application-domains/feature-flags/flagpole.mdx

@@ -13,7 +13,9 @@ options:
   'feature.organizations:is_sentry':
     created_at: '2024-06-01T00:00:00.000000'
     enabled: false
-    owner: hybrid-cloud
+    owner:
+      - team: hybrid-cloud
+      - email: foo@sentry.io
     segments:
     - conditions:
       - operator: in
@@ -30,9 +32,6 @@ options:
 
 : The ISO 8601 datetime of when the feature was added to the config yaml.
 
-`owner`
-
-: The team name or email of the user that owns this feature flag
 
 `enabled` [optional]
 
@@ -42,6 +41,16 @@ options:
 
 : A wrapper around a list of conditions, acting as a logical grouping of customers/entities to enable the feature flag for.  Segments allow you to create `OR` operations with other segments, meaning at least one segment must evaluate to `True` for a feature to be granted. If an empty segments list is provided, the feature will evaluate to `False`.
 
+### Owner
+
+`team` 
+
+: The name of the team that owns this feature flag
+
+`email` [optional]
+
+: The email of the team that owns this feature flag
+
 ### Segments
 
 `conditions`