Datacube v1.8.11

Administrative release to address two technical issues in release 1.8.10:

1. 1.8.10 attempted to improve compatibility with recent versions of xarray, however further work was needed to fully achieve that compatibility.
2. 1.8.10 was released with dependency discrepancies between setup.py (pip), conda-environment.yml (conda) and constrains.in (Docker).

Full list of changes:

• Simplify Github actions (#1393)
• Update conda create environment README (#1394)
• Update conda environment file and add notes to release process to ensure pip and conda
  dependencies are in sync and up-to-date. (#1395)
• Update docker constraints (#1396)
• Compatible with the changes w.r.t. MultiIndex and coord/dims introduced since xarray>2022.3.0 (#1397)
• Final sync of conda/pip dependencies and update release notes. (#1398)

Includes contributions from @SpacemanPaul, @pindge, @Ariana-B, @emmaai and @omad.