update prerequisite's go version (#354)

Author: aryanmehrotra

docs/quick-start/introduction/page.md

@@ -1,6 +1,6 @@
 # Prerequisite
 
--  Go 1.19 or above.
+-  Go 1.20 or above.
    To check the version use the following command `go version`.
 
 -  Prior familiarity with Golang syntax is essential. [Golang Tour](https://tour.golang.org/) is highly recommended as it has an excellent guided tour.