Fix refs to schema

Author: nflaig

apis/validator/aggregate_and_proofs.v2.yaml

@@ -35,7 +35,7 @@ post:
       content:
         application/json:
           schema:
-            $ref: "../../../beacon-node-oapi.yaml#/components/schemas/IndexedErrorMessage"
+            $ref: "../../beacon-node-oapi.yaml#/components/schemas/IndexedErrorMessage"
     "415":
       $ref: '../../beacon-node-oapi.yaml#/components/responses/UnsupportedMediaType'
     "500":

apis/validator/sync_committee_contribution_and_proof.yaml

@@ -21,6 +21,6 @@ post:
       content:
         application/json:
           schema:
-            $ref: "../../../beacon-node-oapi.yaml#/components/schemas/IndexedErrorMessage"
+            $ref: "../../beacon-node-oapi.yaml#/components/schemas/IndexedErrorMessage"
     "500":
       $ref: '../../beacon-node-oapi.yaml#/components/responses/InternalError'