termshark: prefer dumpcap from PATH to fix using security wrapper

Prepending wireshark-cli to the PATH means it will get used instead of
one already in the PATH. This is bad since, in most cases, `dumpcap`
needs a `security.wrappers` definition (e.g. from `programs.wireshark`),
but this would not use that. Change to suffix so that the
security-wrapped dumpcap will be used instead.

See https://github.com/NixOS/nixpkgs/issues/322121.

pkgs/by-name/te/termshark/package.nix

@@ -25,7 +25,7 @@ buildGoModule rec {
   doCheck = false;
 
   postFixup = ''
-    wrapProgram $out/bin/termshark --prefix PATH : ${lib.makeBinPath [ wireshark-cli ]}
+    wrapProgram $out/bin/termshark --suffix PATH : ${lib.makeBinPath [ wireshark-cli ]}
   '';
 
   ldflags = [