Release schedule for pyMOR 2023.2

[lbalicki]

Hi @pymor/all,

in the previous community meeting, we set the release date to December 7. This means that:

• the soft freeze will be on November 2 (no new feature pull requests entering the release milestone*) and
• the hard freeze will be on November 30 (no new pull requests entering the release*).

*with possible exceptions. See the release process checklist for details.

[lbalicki]

We are now in the soft freeze for the 2023.2 release. This means no new feature pull requests can be added to the release milestone. Exceptions need to be approved by the release manager.

[lbalicki]

We are now in the hard freeze for the 2023.2 release. This means no new pull requests (except release notes and bug fixes) will be merged into the main branch.