ci: Skip CI on changelog update

Author: seandstewart

Makefile

@@ -84,7 +84,7 @@ alias ?= latest
 changelog:  ## Compile the latest changelog for the current branch.
 	@$(RUN_PREFIX) git-cliff --bump
 	@git add docs/changelog.md
-	@git commit -m "[git-cliff] Update changelog." --allow-empty
+	@git commit -m "[skip ci] Update changelog." --allow-empty
 .PHONY: changelog
 
 release-notes:  ## Compile release notes for VCS