[Docs] Updated cookbook/theme R2 - git compare link added
[Docs] Updated cookbook/theme R2 - git compare link added

pkarw/vue-storefront,DivanteLtd/vue-storefront,pkarw/vue-storefront,DivanteLtd/vue-storefront,pkarw/vue-storefront,pkarw/vue-storefront,DivanteLtd/vue-storefront,DivanteLtd/vue-storefront