Association: use proper sdbusplus type

Change-Id: I1b61b82e60ff3e8eed518cfe0776a62ecbc1c95e
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/xyz/openbmc_project/Association.interface.yaml b/xyz/openbmc_project/Association.interface.yaml
index a7abb36..bbe373d 100644
--- a/xyz/openbmc_project/Association.interface.yaml
+++ b/xyz/openbmc_project/Association.interface.yaml
@@ -8,7 +8,7 @@
     of the object implementing Association.
 properties:
     - name: Endpoints
-      type: as # TODO should be ao
+      type: array[path]
       description: >
           An array of association endpoints.