[OCONF-879] change mft code owner (#2559)

Author: Barthelemy

.github/CODEOWNERS

@@ -6,7 +6,7 @@
 /Modules/PID/      @njacazio
 /Modules/EMCAL/    @jokonig @Barthelemy @knopers8
 /Modules/TPC/      @wiechula
-/Modules/MFT/      @diana0x0f
+/Modules/MFT/      @AlexianL
 /Modules/ITS/      @iravasen @IsakovAD
 /Modules/TRD/      @martenole @bazinski
 /Modules/FOCAL/    @mfasDa @fjonasALICE