scipopt-ug: fixup scipVersion

pkgs/by-name/sc/scipopt-ug/package.nix

···
   version = "1.0.0-beta6";
 
   # To correlate scipVersion and version, check: https://scipopt.org/#news
-  scipVersion = "9.2.2";
+  scipVersion = "9.2.3";
 
   # Take the SCIPOptSuite source since no other source exists publicly.
   src = fetchzip {