DEVELOPERS: update Christophe Priouzeau e-mail address

Signed-off-by: Christophe Priouzeau <christophe.priouzeau@foss.st.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -525,7 +525,7 @@ F:	package/rtl8821au/
 F:	package/runc/
 F:	package/tini/
 
-N:	Christophe Priouzeau <christophe.priouzeau@st.com>
+N:	Christophe Priouzeau <christophe.priouzeau@foss.st.com>
 F:	board/stmicroelectronics/stm32f429-disco/
 F:	board/stmicroelectronics/stm32f469-disco/
 F:	configs/stm32f429_disco_defconfig