[CI][microTVM]Update ci_cortexm image (apache#13764)

Update cortexm image to ci-cortexm:20230111-165944-a9c6f137d after
CMSIS-NN moved to a new github location and Cortex-M image was
supported for Ubuntu 20.04.

ci/jenkins/docker-images.ini

@@ -18,7 +18,7 @@
 # This data file is read during when Jenkins runs job to determine docker images.
 [jenkins]
 ci_arm: tlcpack/ci-arm:20221013-060115-61c9742ea
-ci_cortexm: tlcpack/ci-cortexm:20221013-060115-61c9742ea
+ci_cortexm: tlcpack/ci-cortexm:20230111-165944-a9c6f137d
 ci_cpu: tlcpack/ci-cpu:20230110-070003-d00168ffb
 ci_gpu: tlcpack/ci-gpu:20221128-070141-ae4fd7df7
 ci_hexagon: tlcpack/ci-hexagon:20221013-060115-61c9742ea