fix injectedItemSource

Author: ben-kalmus

specs/composition-full/common/params/Composition.yml

@@ -58,4 +58,3 @@ externalInjectedItem:
   description: |
     An objectID injected into an external source.
   example: {'objectID': 'my-object-1', 'metadata': {'my-field': 'my-value'}}
-

specs/composition-full/common/schemas/components/CompositionBehavior.yml

@@ -88,6 +88,13 @@ injectedItem:
     - length
 
 injectedItemSource:
+  type: object
+  additionalProperties: false
+  properties:
+    search:
+      $ref: './InjectionSource.yml#/search'
+    external:
+      $ref: './InjectionSource.yml#/external'
   oneOf:
-    - $ref: './InjectionSource.yml#/search'
-    - $ref: './InjectionSource.yml#/external'
+    - required: [search]
+    - required: [external]