itsycal: rfc format; itsycal: add meta.changelog; ityscal: 0.15.3 -> 0.15.4 (#326327)

* itsycal: rfc format

* itsycal: add meta.changelog

* ityscal: 0.15.3 -> 0.15.4

Diff: https://github.com/sfsam/Itsycal/compare/0.15.3...0.15.4

pkgs/by-name/it/itsycal/package.nix

@@ -1,15 +1,16 @@
-{ lib
-, fetchzip
-, stdenvNoCC
+{
+  lib,
+  fetchzip,
+  stdenvNoCC,
 }:
 
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "itsycal";
-  version = "0.15.3";
+  version = "0.15.4";
 
   src = fetchzip {
     url = "https://itsycal.s3.amazonaws.com/Itsycal-${finalAttrs.version}.zip";
-    hash = "sha256-jpTlJY7yAARrkHzreQKbFaKj0sYp950R0qPPcDeY6AE=";
+    hash = "sha256-+Pi74xP5BcjhgtR3YCqJknl54wdNIU8ekEwQUaFp4T8=";
   };
 
   installPhase = ''
@@ -22,6 +23,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   '';
 
   meta = {
+    changelog = "https://www.mowglii.com/itsycal/versionhistory.html";
     description = "Itsycal is a tiny menu bar calendar";
     homepage = "https://www.mowglii.com/itsycal/";
     license = lib.licenses.mit;