[docs] Add warning about download token exposure relates to #3605 and #3396#3609

FrederickEngelhardt wants to merge 1 commit intornmapbox:mainrnmapbox/maps:mainfrom

FrederickEngelhardt:chore/docs-add-warning-about-download-token-exposure-expoFrederickEngelhardt/rnmapbox-maps:chore/docs-add-warning-about-download-token-exposure-expoCopy head branch name to clipboard