Boot executable refers to invalid web site boot-clj.com

[leonelag]

Describe the bug
After running the boot executable, it outputs to stdout a comment with the invalid URL http://boot-clj.com
This address does not point to the correct Boot website.

To Reproduce
Steps to reproduce the behavior:

1. Do a fresh install of boot, running instructions from https://github.com/boot-clj/boot#install
2. Run the command boot --version
3. Example output:
   #http://boot-clj.com
   #Sun Apr 25 12:03:03 BRT 2021
   BOOT_VERSION=2.8.3
   BOOT_CLOJURE_VERSION=1.10.3
   BOOT_CLOJURE_NAME=org.clojure/clojure

Expected behavior
Could print the correct URL to the Boot website, at https://boot-clj.github.io/

Desktop (please complete the following information):

• OS: Ubuntu 20.04

[bbatsov]

Seems the original domain expired and it wasn't renewed.