maint: update contributor information

Updating Zvi's github handle. @zvi-quantivly, please revise your
affiliation in `.maint/MAINTAINERS.md` and let us know if you cannot be
a maintainer anymore (i.e., move your name to `.maint/CONTRIBUTORS.md`.

Thanks!

.mailmap

@@ -69,3 +69,8 @@ Teresa Gomez <[email protected]>
 Teresa Gomez <[email protected]> teresamg
 Yibei Chen <[email protected]>
 William Triplett <[email protected]>
+Zvi Baratz <[email protected]>
+Zvi Baratz <[email protected]> ZviBaratz
+Zvi Baratz <[email protected]> zvi-quantivly
+Zvi Baratz <[email protected]> <[email protected]>
+Zvi Baratz <[email protected]> <[email protected]>

.maint/MAINTAINERS.md

@@ -13,5 +13,5 @@ If you are participating because of your affiliation with another organization (
 | Hagen | McKenzie P. | @mckenziephagen | 0000-0002-7454-8189 | Psychology Department, University of Washington, Seattle, WA, USA |
 | MacNicol | Eilidh | @eilidhmacnicol | 0000-0003-3715-7012 | Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK |
 | Esteban | Oscar | @oesteban | 0000-0001-8435-6191 | Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland |
-| Baratz | Zvi | @ZviBaratz | 0000-0001-7159-1387 | Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel |
+| Baratz | Zvi | @zvi-quantivly | 0000-0001-7159-1387 | Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel |
 | Markiewicz | Christopher J. | @effigies | 0000-0002-6533-164X | Department of Psychology, Stanford University, CA, USA |