docs: update docs referencing OwnerPicker and EntityPicker

Signed-off-by: Enrico Alvarenga <enrico.alvarenga@segment.com>

docs/features/software-templates/writing-templates.md

@@ -44,8 +44,8 @@ spec:
           description: Owner of the component
           ui:field: OwnerPicker
           ui:options:
-            allowedKinds:
-              - Group
+            catalogFilter:
+              kind: Group
     - title: Choose a location
       required:
         - repoUrl
@@ -459,7 +459,7 @@ an owner for them. Ideally, users should be able to select an owner when they go
 through the scaffolder form from the users and groups already known to
 Backstage. The `OwnerPicker` is a custom field that generates a searchable list
 of groups and/or users already in the catalog to pick an owner from. You can
-specify which of the two kinds are listed in the `allowedKinds` option:
+specify which of the two kinds (or both) are listed in the `catalogFilter.kind` option:
 
 ```yaml
 owner:
@@ -468,8 +468,8 @@ owner:
   description: Owner of the component
   ui:field: OwnerPicker
   ui:options:
-    allowedKinds:
-      - Group
+    catalogFilter:
+      kind: [Group, User]
 ```
 
 ## `spec.steps` - `Action[]`