Fix order serializer spec: change from id to number
Fix order serializer spec: change from id to number

RohanM/openfoodnetwork,oeoeaio/openfoodnetwork,ltrls/openfoodnetwork,Matt-Yorkley/openfoodnetwork,ltrls/openfoodnetwork,MikeiLL/openfoodnetwork,Matt-Yorkley/openfoodnetwork,openfoodfoundation/openfoodnetwork,levent/openfoodnetwork,openfoodfoundation/openfoodnetwork,RohanM/openfoodnetwork,MikeiLL/openfoodnetwork,oeoeaio/openfoodnetwork,RohanM/openfoodnetwork,KateDavis/openfoodnetwork,MikeiLL/openfoodnetwork,KateDavis/openfoodnetwork,Em-AK/openfoodnetwork,mkllnk/openfoodnetwork,oeoeaio/openfoodnetwork,mkllnk/openfoodnetwork,openfoodfoundation/openfoodnetwork,levent/openfoodnetwork,Em-AK/openfoodnetwork,KateDavis/openfoodnetwork,mkllnk/openfoodnetwork,Em-AK/openfoodnetwork,levent/openfoodnetwork,ltrls/openfoodnetwork,lin-d-hop/openfoodnetwork,RohanM/openfoodnetwork,MikeiLL/openfoodnetwork,openfoodfoundation/openfoodnetwork,levent/openfoodnetwork,Matt-Yorkley/openfoodnetwork,lin-d-hop/openfoodnetwork,lin-d-hop/openfoodnetwork,ltrls/openfoodnetwork,Em-AK/openfoodnetwork,mkllnk/openfoodnetwork,Matt-Yorkley/openfoodnetwork,lin-d-hop/openfoodnetwork,oeoeaio/openfoodnetwork,KateDavis/openfoodnetwork