Logic reversed in translation check (#9694)

Author: ewjoachim

Makefile

@@ -196,7 +196,7 @@ build-mos: compile-pot
 		done
 
 translations: compile-pot
-ifneq ($(filter false,$(GITHUB_ACTIONS)),)
+ifneq ($(GITHUB_ACTIONS), false)
 	git diff --quiet ./warehouse/locale/messages.pot || (echo "There are outstanding translations, run 'make translations' and commit the changes."; exit 1)
 else
 endif