Preview release description locally

Makefile

@@ -168,6 +168,9 @@ check_release:
 	$(if $(GIT_TAG),,$(error No git tag associated with current commit; set GIT_TAG or add a tag))
 	@echo REF: $(RELEASE_REF)
 	@echo TAG: $(GIT_TAG)
+	@echo --- DESCRIPTION -----------------
+	@sed -n -f changelog.sed CHANGES.md
+	@echo ---------------------------------
 	@echo -n "Confirm? [y/N] " && read ans && [ $${ans:-N} = y ]
 
 release: check_release