Fix #4768. Support Python 3.12 version of BBIM.

.github/workflows/ci-blenderbim-matrix.yml

@@ -39,7 +39,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        pyver: [py39, py310, py311]
+        pyver: [py39, py310, py311, py312]
         config:
           - {
             name: "Windows Build",

src/blenderbim/docs/devs/installation.rst

@@ -25,6 +25,9 @@ You will need to choose which build to download.
 - Choose ``linux``, ``macos`` (Apple Intel), ``macosm1`` (Apple Silicon), or
   ``win`` depending on your operating system
 
+For users who don't follow the `VFX Platform <https://vfxplatform.com/>`_
+standard, we also provide py312 builds.
+
 Sometimes, a build may be delayed, or contain broken code. We try to avoid this,
 but it happens.