Update lm_train_tutorial.md

Yabin Li

2023-12-15 d2266616a142b7f57f29f1a840458a9865f953ac

 egs/aishell/transformer/utils/compute_cmvn.sh

@@ -2,7 +2,7 @@

. ./path.sh || exit 1;
# Begin configuration section.
fbankdir=$1
fbankdir=
nj=32
cmd=./utils/run.pl
feats_dim=80