emacsMacport: 8.2 -> 8.3

pkgs/applications/editors/emacs/macport.nix

@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
   version = "27.2";
 
   emacsName = "emacs-${version}";
-  macportVersion = "8.2";
+  macportVersion = "8.3";
   name = "emacs-mac-${version}-${macportVersion}";
 
   src = fetchurl {
@@ -18,7 +18,8 @@ stdenv.mkDerivation rec {
 
   macportSrc = fetchurl {
     url = "ftp://ftp.math.s.chiba-u.ac.jp/emacs/${emacsName}-mac-${macportVersion}.tar.gz";
-    sha256 = "1bgm2g3ky7rkj1l27wnmyzqsqxzjng7y9bf72ym37wiyhyi2a9za";
+    sha256 = "0q4lbk3nb8rz1ibmf23plgsh8sx2wvhry5bf5mivgz4m4b6s2yij";
+    name = "${emacsName}-mac-${macportVersion}.tar.xz"; # It's actually compressed with xz, not gz
   };
 
   hiresSrc = fetchurl {