dev: Restore security files on make translations

For some reasons, Symfony doesn't detect the security keys and remove
them from the security files. With this patch, we restore these files
immediately with Git.

The downside is that we'll not be able to use `make translations` to
update the security files. Hopefully, we don't change them often (if
ever).

Makefile

@@ -107,6 +107,8 @@ endif
 translations: ## Update the translations from the code
 	$(CONSOLE) translation:extract --format=yaml --force --clean en_GB
 	$(CONSOLE) translation:extract --format=yaml --force --clean fr_FR
+	# Restore the security files as keys are removed from them whereas they should not.
+	git restore translations/security+intl-icu.*
 
 .PHONY: migration
 migration: ## Generate a database migration from entities changes