next.js

7f47d08e - convert let keyword to const keyword to data fetching and caching example (#73251)

convert let keyword to const keyword to data fetching and caching example (#73251) Improving Documentation - I noticed that using const instead of let in the example code for data fetching and caching is more appropriate, so I made the change.  Co-authored-by: Delba de Oliveira <32464864+delbaoliveira@users.noreply.github.com>