Second November 2021 snapshot
This is a snapshot of the repository in November 2021, with many notebooks updated to pymc3 3.11.x and best practices with this version but no noetbooks using pymc 4.x (whose beta release is near). This is therefore not as much a release as a snapshot at the time as notebooks are updated at their own pace independent of pymc releases and so each snapshot will contain notebooks executed with multiple pymc versions.