tshark: alias to wireshark-cli

the tshark alias got removed in https://github.com/NixOS/nixpkgs/pull/161146.
To have a longstanding alias, it was recommended to add it next to the
attribute.

pkgs/top-level/all-packages.nix

@@ -25792,6 +25792,7 @@ with pkgs;
   };
   wireshark-qt = wireshark;
 
+  tshark = wireshark-cli;
   wireshark-cli = wireshark.override {
     withQt = false;
     libpcap = libpcap.override { withBluez = stdenv.isLinux; };