nixos/java: No bashisms in environment.shellInit script (#294121)

Author: tomodachi94

nixos/modules/programs/java.nix

@@ -67,7 +67,7 @@ in
     environment.systemPackages = [ cfg.package ];
 
     environment.shellInit = ''
-      test -e ${cfg.package}/nix-support/setup-hook && source ${cfg.package}/nix-support/setup-hook
+      test -e ${cfg.package}/nix-support/setup-hook && . ${cfg.package}/nix-support/setup-hook
     '';
 
   };