Update 12.temporary_ins/40.classical-mechanics/30.n3/30.point-kinematics/20.overview/cheatsheet.fr.md

Update 12.temporary_ins/40.classical-mechanics/30.n3/20.framework-of-classical-mechanics/20.overview/cheatsheet.fr.md

Update 12.temporary_ins/04-math-tools/20.famous-equations/20.alembert-s-wave-equation/20.overview/cheatsheet.fr.md