treewide: fix typos in version check overrides

Fix shellcheck shell configuration in version check overrides.

Signed-off-by: George Sapkin <george@sapk.in>
(cherry picked from commit 6a20260a1f)
[drop avahi, fixed already, and the files openwrt-25.12 does not have]
Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

lang/python/python-pyserial/test-version.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# shellckeck shell=busybox
+# shellcheck shell=busybox
 
 case "$PKG_NAME" in
 python3-pyserial|\

lang/python/python-tabulate/test-version.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# shellckeck shell=busybox
+# shellcheck shell=busybox
 
 case "$PKG_NAME" in
 python3-tabulate|\