OTA fixup 3

scripts/build-ota-translations.sh

@@ -12,7 +12,7 @@ trap finish EXIT
 # check PO files for errors and remove the ones that won't compile:
 for po in locales/*.po ; do
     if ! stderr=$(msgfmt -c -o /dev/null "$po" 2>&1) ; then
-        echo "::warning title=Failed to compile $po::`echo $stderr`"
+        echo "::error title=Failed to compile $po::`echo $stderr`"
         echo "::group::cat -n $po"
         cat -n "$po"
         echo "::endgroup::"