Fix haml-lint InstanceVariables rule for admin/webhooks/_form (#26062)

.haml-lint_todo.yml

@@ -1,13 +1,13 @@
 # This configuration was generated by
 # `haml-lint --auto-gen-config`
-# on 2023-08-28 13:08:37 -0400 using Haml-Lint version 0.50.0.
+# on 2023-09-28 10:03:39 -0400 using Haml-Lint version 0.50.0.
 # The point is for the user to remove these configuration records
 # one by one as the lints are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of Haml-Lint, may require this file to be generated again.
 
 linters:
-  # Offense count: 945
+  # Offense count: 946
   LineLength:
     enabled: false
 
@@ -15,7 +15,7 @@ linters:
   UnnecessaryStringOutput:
     enabled: false
 
-  # Offense count: 57
+  # Offense count: 59
   RuboCop:
     enabled: false
 
@@ -26,12 +26,11 @@ linters:
       - 'app/views/admin/reports/show.html.haml'
       - 'app/views/disputes/strikes/show.html.haml'
 
-  # Offense count: 28
+  # Offense count: 25
   InstanceVariables:
     exclude:
       - 'app/views/admin/reports/_actions.html.haml'
       - 'app/views/admin/roles/_form.html.haml'
-      - 'app/views/admin/webhooks/_form.html.haml'
       - 'app/views/auth/registrations/_status.html.haml'
       - 'app/views/auth/sessions/two_factor/_otp_authentication_form.html.haml'
       - 'app/views/relationships/_account.html.haml'