Update 40ss-ft75.md, remove "preprint"
manuscript link was updated to point to published article https://git-r3lab.uni.lu/R3/r3-pages/-/issues/28, but forgot to remove the word "preprint" on the Frozen Page
manuscript link was updated to point to published article https://git-r3lab.uni.lu/R3/r3-pages/-/issues/28, but forgot to remove the word "preprint" on the Frozen Page