same change made to encoder_lowdelay_P_vtm.cfg as done to...

same change made to encoder_lowdelay_P_vtm.cfg as done to encoder_lowdelay_vtm.cfg done in previous commit (LMCSOffset = 1), as LMCS tool off results for LDB and LDP are very similar.

cfg/encoder_lowdelay_P_vtm.cfg

@@ -133,6 +133,7 @@ AffineAmvr                   : 0
 LMCSEnable                   : 1      # LMCS: 0: disable, 1:enable
 LMCSSignalType               : 0      # Input signal type: 0:SDR, 1:HDR-PQ, 2:HDR-HLG
 LMCSUpdateCtrl               : 2      # LMCS model update control: 0:RA, 1:AI, 2:LDB/LDP
+LMCSOffset                   : 1      # chroma residual scaling offset
 MIP                          : 0
 JointCbCr                    : 1      # joint coding of chroma residuals (if available): 0: disable, 1: enable
 PROF                         : 1