refit cohen_obsingle nb/zinb orthos after single-expansion fix

orthos/cohen_obsingle_nb_phantom.tar.gz

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:30768eba37bae453cd180ba3a4ce3f525548868e23d256f3b83f81458cda0a67
-size 21481799
+oid sha256:6f61dabfa42a3a9ff66dbb227c566ca1564874bead10066dfb0a3219bfd0f76b
+size 21477218

orthos/cohen_obsingle_zinb_phantom.tar.gz

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:6a2e7e93cea80d40689f6565185b43eae7e0aed420b782e9ebdde6d4b45ae0e9
-size 24331110
+oid sha256:436e4a356e3765ed07b022f5bbf3feb3f11a078f56d3cd454910af9195f35f91
+size 24259292