Revert "Update kcfg URLS to https"

Note there's a typo here and using https doesn't seem to work.

This reverts commit df8b6026.

src/settings/konsole.kcfg

 <?xml version="1.0" encoding="UTF-8"?>
-<kcfg xmlns="https://www.kde.org/standards/kcfg/1.0"
-      xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
-      xsi:schemaLocation="httpsn://www.kde.org/standards/kcfg/1.0
-      https://www.kde.org/standards/kcfg/1.0/kcfg.xsd" >
+<kcfg xmlns="http://www.kde.org/standards/kcfg/1.0"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:schemaLocation="http://www.kde.org/standards/kcfg/1.0
+      http://www.kde.org/standards/kcfg/1.0/kcfg.xsd" >
   <kcfgfile name="konsolerc" />
   <group name="KonsoleWindow">
     <entry name="ShowMenuBarByDefault" type="Bool">