message: chore(docs): add docs for api v2.10
  There was a motion-affecting bugfix that needed (and got) an API version
  bump but it didn't have a corresponding entry in the versioning file.
diff: @@ -112,6 +112,8 @@ This table lists the correspondence between Protocol API versions and robot soft
  +-------------+-----------------------------+
  | 2.9 | 4.1.0 |
  +-------------+-----------------------------+
  +| 2.10 | 4.3.0 |
  ++-------------+-----------------------------+
  Changes in API Versions
  @@ -201,3 +203,7 @@ Version 2.8
  Version 2.9
  +++++++++++
  - You can now access certain geometry data regarding a labware's well via a Well Object. See :ref:`new-labware-well-properties` for more information.
  +
  +Version 2.10
  +++++++++++++
  +- In Python protocols requesting API version 2.10, moving to the same well twice in a row with different pipettes no longer results in strange diagonal movements.
  