The evaporation rate of a black hole goes up steeply as they get smaller. Even if they make one, it won’t have much mass at all (the collider works with individual ions in a vacuum, so collisions are between things with an atom-scaled mass).
It would evaporate very quickly, if Hawking et al are to be believed.
The “make a black hole” fear is common- PBFA I at Sandia was supposed to make one, then PBFA II, then when PBFA II converted over to Z, that was going to make a black hole.
The big laser for fusion research, RHIC at Brookhaven, there are probably fifty more black hole threatmakers.
That’s why I don’t go public with the project I’m doing in the spare bedroom, I don’t want angry villagers with torches outside.
You can't create a tidal wave in a bathtub.