hisat2: update homepage

and use SPDX 3.0 license identifier

pkgs/applications/science/biology/hisat2/default.nix

@@ -37,8 +37,8 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Graph based aligner";
-    license = licenses.gpl3;
-    homepage = "https://ccb.jhu.edu/software/hisat2/index.shtml";
+    license = licenses.gpl3Plus;
+    homepage = "https://daehwankimlab.github.io/hisat2/";
     maintainers = with maintainers; [ jbedo ];
     platforms = [ "x86_64-linux" "i686-linux" ];
   };