chore(*): add mathlib4 synchronization labels (#17596)
This add mathlib4 synchronization labels for the following files:
* logic.equiv.defs -- mathlib4#550 7951ed37deb3b2923a6f47d9bdcb4d69a8703550
* order.rel_classes -- mathlib4#560 fd47bdf09e90f553519c712378e651975fe8c829
* order.max -- mathlib4#567 fd47bdf09e90f553519c712378e651975fe8c829
* order.compare -- mathlib4#569 fd47bdf09e90f553519c712378e651975fe8c829
* order.synonym -- mathlib4#562 fd47bdf09e90f553519c712378e651975fe8c829
* data.char -- mathlib4#609 aab56fd783b265168f660d6b46709961153c4c20
* data.num.basic -- mathlib4#607 aab56fd783b265168f660d6b46709961153c4c20
* algebra.order.ring.lemmas -- mathlib4#482 7cca171008afb30576d2d4c51173700a780c23d0
