Add shell.ghc9102

Author: hamishmack

nix/shell.nix

@@ -150,6 +150,7 @@ let
     ghc967 = full-shell;
     ghc966 = full-shell;
     ghc984 = quick-shell;
+    ghc9102 = quick-shell;
     ghc9101 = quick-shell;
   }.${project.args.compiler-nix-name};