This fixes some minor things in our migration guide for v5.3.0-alpha2:
- typo in our migration guide around
.dropdown-menu-dark
found by @crdo in https://github.com/twbs/bootstrap/commit/c735b2e196544b3bba25d645f4d725e8667b106c#r99475857. - changed the sentence regarding the color picker in our examples since it now has been developed and merged