fix: replace hint style 'warning' -> 'working' across docs (fixes #307)#312

sumn2u merged 2 commits intosumn2u:mainsumn2u/learn-javascript:mainfrom

AAYUSH-SPIDEY-SHARMA:fix/hint-warning-to-working-#307AAYUSH-SPIDEY-SHARMA/learn-javascript:fix/hint-warning-to-working-#307Copy head branch name to clipboard