Update code owners (#5578)

Author: vkucera

CODEOWNERS

@@ -36,7 +36,7 @@
 /PWGEM @alibuild @mikesas @rbailhac @feisenhu
 /PWGEM/Dilepton @alibuild @mikesas @rbailhac @dsekihat @ivorobye @feisenhu
 /PWGEM/PhotonMeson @alibuild @mikesas @rbailhac @m-c-danisch @novitzky @mhemmer-cern @dsekihat
-/PWGHF @alibuild @vkucera @fcolamar @fgrosa @fcatalan92 @mfaggin @mmazzilli @deepathoms @nzardosh @NicoleBastid
+/PWGHF @alibuild @vkucera @fcolamar @fgrosa @fcatalan92 @mfaggin @mmazzilli @deepathoms @nzardosh @NicoleBastid @hahassan7
 /PWGLF @alibuild @ercolessi @fmazzasc @chiarapinto @BongHwi @smaff92 @mbombara @ChiaraDeMartin95 @njacazio @skundu692
 /PWGMM @alibuild @aalkin
 /PWGMM/Lumi @alibuild @aalkin