Add trailing slash to `layouts` in readme.
Add trailing slash to `layouts` in readme.

carl-alberto/business-portfolio,andbaz/launchbaz,carl-alberto/business-portfolio,madeso-uk/vcsassist,jchck/jchck_,jchck/jchck_,vaishaliagola27/_s,andbaz/launchbaz,madeso-uk/vcsassist,vaishaliagola27/_s,vaishaliagola27/_s