Update affiliation

Also, removed "Pull Request Review" from above @janosh's name, to reflect his increased efforts in maintaining pymatgen that go quite beyond only PR review!

docs_rst/team.rst

@@ -43,8 +43,8 @@ Lead Maintainers
    :alt: ORCID profile for 0000-0001-5726-2587
 
 | **Matthew Horton** |mkhorton| |0000-0001-7777-8871|
-| Materials Project Staff, Persson Group Member
-| Lawrence Berkeley National Laboratory
+| Senior Research Software Engineer
+| Microsoft Research
 
 .. |mkhorton| image:: https://cdnjs.cloudflare.com/ajax/libs/octicons/8.5.0/svg/mark-github.svg
    :target: https://github.com/mkhorton
@@ -58,11 +58,6 @@ Lead Maintainers
    :height: 16
    :alt: ORCID profile for 0000-0001-7777-8871
 
-Pull Request Review
--------------------
-
-Additional support for reviewing pull requests from:
-
 | **Janosh Riebesell** |janosh|
 | University of Cambridge
 .. |janosh| image:: https://cdnjs.cloudflare.com/ajax/libs/octicons/8.5.0/svg/mark-github.svg