liana-py

pin `anndata` to `<=0.10.8` due to scverse/mudata#77; this will be required also with `mudata 0.3.1` if we want to support Py <3.10

set required Python to `>=3.8`: the `<3.12` causes a broad incompatibility issue in package management

fix unclosed div

fix bivariate equation

update sma tutorial