redeclare the teaser model to use buildings.media.air medium

[nllong]

Any background context you want to provide?

Auto-generated TEASER models used the incorrect medium.

What does this PR accomplish?

• uses new release candidate of modelica builder to replace the redeclaration of the medium in the teaser models

How should this be manually tested?

• run pytest and take any of the teaser test models and run in dymola.

What are the relevant tickets?

Fixes #38
^-- that was an old ticket, finally addressed!

Screenshots (if appropriate)

This code:

results in an updated model shown in Dymola here:

[vtnate]

This works as expected, and the models run in Dymola, so I'm taking that as proof that the modelica-builder PR is doing what we want. Badda boom badda bing!