Fix heading typo and translate "Dropdowns" (#33033)
Fix heading typo and translate "Dropdowns" (#33033)

1.  line 5: Corrected spelling of desplegables in ##Listas desplegables
2.  line 7:  translated "dropdowns" to "menús desplegables"
raisedadead/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,jonathanihm/freeCodeCamp,jonathanihm/freeCodeCamp,BhaveshSGupta/FreeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp