feat: use a shorter name for Ring Operator \u{2218}

undergradmath.typ

@@ -257,7 +257,7 @@ Just type them!
   cell($ident$, `ident`), cell($tilde.not$, `tilde.not`), cell($diff$, `diff`),
   cell($prec$, `prec`), cell($plus.circle$, `plus.circle`), cell($nabla$, `nabla`),
   cell($prec.eq$, `prec.eq`), cell($minus.circle$, `minus.cirle`), cell($planck.reduce$, `planck.reduce`),
-  cell($succ$, `succ`), cell($dot.circle$, `dot.circle`), cell($circle.stroked.tiny$, `circle.stroked.tiny`),
+  cell($succ$, `succ`), cell($dot.circle$, `dot.circle`), cell($compose$, `compose`),
   cell($succ.eq$, `succ.eq`), cell($times.circle$, `times.circle`), cell($star$, `star`),
   cell($prop$, `prop`), cell($\u{2298}$, [`\u{2298}` @tricky]), cell($sqrt("")$, `sqrt("")`),
   cell($\u{2250}$, [`\u{2250}` @tricky]), cell($harpoon.tr$, `harpoon.tr`), cell($checkmark$, `checkmark`),