Add SBCL and ASDF version info to README

[HM0880]

The lowest-supported versions should also go in the website docs, but I do not know where those files are.

[CLAassistant]

All committers have signed the CLA.

[vindarel]

FWIW I had to upgrade ASDF to version 3.3.5 for a CI on another project, here's a one-liner:

( cd ~/common-lisp/ && wget https://asdf.common-lisp.dev/archives/asdf-3.3.5.tar.gz  && tar -xvf asdf-3.3.5.tar.gz && mv asdf-3.3.5 asdf )

[snunez1]

@HM0880, do you need help with the CLA? I'd like to merge this before I push up some changes.

[HM0880]

@snunez1 Just signed the CLA; sorry for the delay!

[HM0880]

@Symbolics @snunez1

Just updated the data path (https://github.com/HM0880/lisp-stat/commit/6c52d4d6641675d3c604b3f46055ed90306c2067) and added the one-liner (https://github.com/HM0880/lisp-stat/commit/b4da5feb1ca3c00af580ea3a8f2faad29610272f). Thanks for your patience.