message: Fix CMSIS tag in readme
diff: @@ -101,7 +101,7 @@ The following command will download the required dependencies and then compile a
  binary for the SparkFun Edge:
  ```
  -make -f tensorflow/lite/experimental/micro/tools/make/Makefile TARGET=sparkfun_edge TAGS="CMSIS" micro_speech_bin
  +make -f tensorflow/lite/experimental/micro/tools/make/Makefile TARGET=sparkfun_edge TAGS="cmsis-nn" micro_speech_bin
  ```
  The binary will be created in the following location:
  