FindBoost: Add note about header-only libs in warning msg
It seems users run into this from time to time (#19609, #19606 (closed)), the added note may help.
Topic-rename: FindBoost-clarify-header-only
A GitLab update will be applied on April 24th, between 8am and 10am, EST (UTC-05:00). This site may have intermittent delays during that time.
It seems users run into this from time to time (#19609, #19606 (closed)), the added note may help.
Topic-rename: FindBoost-clarify-header-only