Fix name of PyPI token variable

The changed line accesses the environment variable "PYPI_TOKEN" that's initialized from the secret further up.
When the secret name was changed, we had accidentally changed the name of the environment variable only in this line.

Fix readme underlining.

Update __init__.py

Update RELEASE-NOTES.md

Mark 3.11.3 release as broken per discussion

Release PyMC3 v3.11.3 (pymc-devs#4941)

* Release PyMC3 v3.11.3

* Update RELEASE-NOTES.md

Prepare 3.11.2 release

Bump patch version for 3.11.1 release

link to Theano-PyMC 1.1.0 release notes, mention BART.predict, update…

… release date

bumping version to 3.10.0 (pymc-devs#4309)

* bumping version to 3.10.0

* adding PR 4211 and 4260 to release notes

* typo

Fixed error message referencing non-existent file (pymc-devs#4039)

Co-authored-by: AlexAndorra <[email protected]>

Set-up 3.9.2 Release (pymc-devs#3982)

* Updated RELEASE NOTES
* Bumped version number