DOC: fix formatting / links of API refs in 1.0.2 whatsnew#32620

TomAugspurger merged 1 commit intopandas-dev:masterpandas-dev/pandas:masterfrom

jorisvandenbossche:doc-1.0.2-cleanjorisvandenbossche/pandas:doc-1.0.2-cleanCopy head branch name to clipboard