Update CMSIS-NN download SHA-1 (#2563)

The latest CMSIS-NN adds MVE support for int4 convolution, depthwise and fully connected.
BUG=just updating to latest

tensorflow/lite/micro/tools/make/ext_libs/cmsis_nn_download.sh

diff --git a/tensorflow/lite/micro/tools/make/ext_libs/cmsis_nn_download.sh b/tensorflow/lite/micro/tools/make/ext_libs/cmsis_nn_download.sh
index 195c0ca..bd8c615 100755
--- a/tensorflow/lite/micro/tools/make/ext_libs/cmsis_nn_download.sh
+++ b/tensorflow/lite/micro/tools/make/ext_libs/cmsis_nn_download.sh
@@ -47,9 +47,9 @@
   echo >&2 "${DOWNLOADED_CMSIS_NN_PATH} already exists, skipping the download."
 else
 
-  ZIP_PREFIX_NN="15dbe7cda7130766777f18a69388238bc6540cef"
+  ZIP_PREFIX_NN="01dee38e6d6bfbbf202f0cd425bbea1731747d51"
   CMSIS_NN_URL="http://github.com/ARM-software/CMSIS-NN/archive/${ZIP_PREFIX_NN}.zip"
-  CMSIS_NN_MD5="6121fa707d4dac17acb4e222453a38a6"
+  CMSIS_NN_MD5="f20be93ededf42bb704c19f699a24313"
 
   # wget is much faster than git clone of the entire repo. So we wget a specific
   # version and can then apply a patch, as needed.