po: Update ci regex and POTFILES.skip
Change the gettext
grep to also include a possible g_dpgettext2
.
This also changes the grep command to "normal" (extended) regex,
which is perhaps easier to read without all the escaping backslashes.
Even though cc-keyboard-item.c
contains no translateable strings, it
does contain a g_dpgettext2()
call for the "gtk40" domain. Damned Lies
still picks this up.
So, add cc-keyboard-item.c
to POTFILES.skip, which also fixes the
updated ci.