How you want to create a dynamic link?
With a permanent “formula” inside your Dashboard?
Templater plugin have “dynamic commands” like <%+ tp.date.now() %> but I think they don’t work properly inside “[[ ]]”.
Dataview plugin can solve you problem using inline queries like these:
`=link(dateformat(date(today), "yyyy-MM-dd"))`
`="[[" + dateformat(date(today), "yyyy-MM-dd") + "]]"`