Add harrisonthorne as a maintainer

(it's me :))

Adding myself as a maintainer for my contribution to nixpkgs with
palapeli.

maintainers/maintainer-list.nix

@@ -5289,6 +5289,12 @@
       fingerprint = "3F35 E4CA CBF4 2DE1 2E90  53E5 03A6 E6F7 8693 6619";
     }];
   };
+  harrisonthorne = {
+    email = "harrisonthorne@proton.me";
+    github = "harrisonthorne";
+    githubId = 33523827;
+    name = "Harrison Thorne";
+  };
   harvidsen = {
     email = "harvidsen@gmail.com";
     github = "harvidsen";