dt-bindings: timer: Update maintainers for st,stm32-timer

Benjamin has left the company, add Fabrice and myself as maintainers.
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20211110150144.18272-2-patrice.chotard@foss.st.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/timer/st,stm32-timer.yaml

@@ -7,7 +7,8 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: STMicroelectronics STM32 general-purpose 16 and 32 bits timers bindings
 
 maintainers:
-  - Benjamin Gaignard <benjamin.gaignard@st.com>
+  - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
+  - Patrice Chotard <patrice.chotard@foss.st.com>
 
 properties:
   compatible: