[gimp] build: fix Windows installer lang test after recent re-encoding drop.

[Jehan <jehanp src gnome org>]

commit bf9c488560c9327df3d16748cb854795707a1041
Author: Jehan <jehan girinstud io>
Date:   Wed Dec 22 16:30:04 2021 +0100

    build: fix Windows installer lang test after recent re-encoding drop.

 build/windows/installer/lang/test-installer-langs.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/build/windows/installer/lang/test-installer-langs.sh 
b/build/windows/installer/lang/test-installer-langs.sh
index 2b28984661..d47a4e6048 100755
--- a/build/windows/installer/lang/test-installer-langs.sh
+++ b/build/windows/installer/lang/test-installer-langs.sh
@@ -24,7 +24,7 @@ if [ "$PO_LANGS" != "$INSTALLER_LANGS" ]; then
   exit 1
 fi
 
-AUTOTOOLS_LANGS=`grep '[a-zA-Z_]*:\[[a-zA-Z_]*\]:[A-Z0-9-]*' 
${GIMP_TESTING_ABS_TOP_SRCDIR}/build/windows/installer/lang/Makefile.am | \
+AUTOTOOLS_LANGS=`grep '[a-zA-Z_]*:\[[a-zA-Z_]*\]' 
${GIMP_TESTING_ABS_TOP_SRCDIR}/build/windows/installer/lang/Makefile.am | \
                  sed 's/^\t*\([a-zA-Z_]*\):.*$/\1/' |sort`
 AUTOTOOLS_LANGS=`echo "$AUTOTOOLS_LANGS" | tr '\n\r' ' ' | sed 's/\<en\> //'`