tinyxml-2: update homepage (#185586)

pkgs/development/libraries/tinyxml-2/default.nix

···
 
   meta = {
     description = "A simple, small, efficient, C++ XML parser";
-    homepage = "http://www.grinninglizard.com/tinyxml2/index.html";
+    homepage = "https://www.grinninglizard.com/tinyxml2/index.html";
     platforms = lib.platforms.unix;
     license = lib.licenses.zlib;
   };