Update supporters for 2025.4.0

Author: jesserockz

guides/supporters.rst

@@ -1218,6 +1218,7 @@ Contributors
 - `maringeph (@maringeph) <https://github.com/maringeph>`__
 - `Mario (@mario-tux) <https://github.com/mario-tux>`__
 - `Mario Di Vece (@mariodivece) <https://github.com/mariodivece>`__
+- `Marius Greuel (@mariusgreuel) <https://github.com/mariusgreuel>`__
 - `Mark Hildreth (@markhildreth) <https://github.com/markhildreth>`__
 - `Mark Schabacker (@markschabacker) <https://github.com/markschabacker>`__
 - `Marek Marczykowski-Górecki (@marmarek) <https://github.com/marmarek>`__
@@ -2113,4 +2114,4 @@ Contributors
 - `Christian Zufferey (@zuzu59) <https://github.com/zuzu59>`__
 - `Zynth-dev (@Zynth-dev) <https://github.com/Zynth-dev>`__
 
-*This page was last updated April 16, 2025.*
+*This page was last updated April 17, 2025.*