MLECO-3449: Update tflite_micro submodule

Updating tflite_micro version according to the release from mlplatform:
https://review.mlplatform.org/plugins/gitiles/ml/ethos-u/ethos-u/+/refs/heads/master/22.08.json#49



Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
Change-Id: I212f1e8540e88aa339b6008371b62f9028b1d3d7