html.templates: fix typo in description of template-convert word
html.templates: fix typo in description of template-convert word

erg/factor,erg/factor,erg/factor,erg/factor,erg/factor,erg/factor,mcandre/factor,mcandre/factor,mcandre/factor,mcandre/factor,erg/factor,mcandre/factor,mcandre/factor,mcandre/factor