docs(forms): fix incorrect legend nesting in fieldset
docs(forms): fix incorrect legend nesting in fieldset

m5o/bootstrap,tjkohli/bootstrap,twbs/bootstrap,GerHobbelt/bootstrap,inway/bootstrap,GerHobbelt/bootstrap,inway/bootstrap,twbs/bootstrap,m5o/bootstrap,tjkohli/bootstrap,coliff/bootstrap,inway/bootstrap,coliff/bootstrap,GerHobbelt/bootstrap