update README.md for 3.23.12.0
@ -148,6 +148,12 @@ You need approximately 10GB of space for the build.
Prior AREDN® images can be rebuilt. Replace one of the following after
the "cd aredn" command above:
AREDN® release 3.23.12.0
```
git checkout 3.23.12.0
AREDN® release 3.23.8.0