Ask for bash in 50-krunner-activate-typing.sh

50-krunner-activate-typing.sh contains bashisms, so the shebang should ask
env for bash, not sh. When /bin/sh is linked to a shell other than bash, the
script won't work.

kconf_update/50-krunner-activate-typing.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env sh
+#!/usr/bin/env bash
 
 # SPDX-FileCopyrightText: 2026 Guillermo Steren <gstkein@gmail.com>
 #