DOC: update SemiMonthEnd examples to not use (n=0)#52171

mroeschke merged 1 commit intopandas-dev:mainpandas-dev/pandas:mainfrom

MarcoGorelli:remove-n-equals-zero-tip-from-semi-month-endMarcoGorelli/pandas:remove-n-equals-zero-tip-from-semi-month-endCopy head branch name to clipboard