docs: Add a link to hugo-openapispec-shortcode
docs: Add a link to hugo-openapispec-shortcode

Added a link to the Hugo Open API Spec shortcode which allows you to embed OAI Spec (formerly known as Swagger) in your site.

mitchchn/hugo,tubo028/hugo,mitchchn/hugo,MarkDBlackwell/hugo,mdhender/hugo,MarkDBlackwell/hugo,Zenithar/hugo,bogem/hugo,ffrizzo/hugo,fedelibre/hugo,mdhender/hugo,gohugoio/hugo,mayah/hugo,digitalcraftsman/hugo,ffrizzo/hugo,fedelibre/hugo,mdhender/hugo,fedelibre/hugo,anthonyfok/hugo,mayah/hugo,gohugoio/hugo,jygastaud/hugo,anthonyfok/hugo,gohugoio/hugo,anthonyfok/hugo,bogem/hugo,Zenithar/hugo,mdhender/hugo,tubo028/hugo,digitalcraftsman/hugo,jygastaud/hugo,fedelibre/hugo