Fixed opensuse depexts

Author: mmottl

postgresql.opam

@@ -32,8 +32,8 @@ depexts: [
   ["postgresql-devel"] {os-distribution = "centos"}
   ["postgresql-devel"] {os-distribution = "rhel"}
   ["postgresql-devel"] {os-distribution = "fedora"}
+  ["postgresql-devel"] {os-distribution = "opensuse"}
   ["postgresql-dev"] {os-distribution = "alpine"}
-  ["postgresql"] {os-distribution = "opensuse"}
   ["postgresql"] {os = "macos" & os-distribution = "homebrew"}
   ["postgresql96"] {os = "macos" & os-distribution = "macports"}
 ]