docs(tools): Update README of tools
README
-The SDK uses 'kconfig', 'idf_monitor.py' of esp-idf and information of esp-idf is following:
+Information of 'idf_monitor.py' is following:
URL: https://github.com/espressif/esp-idf
tag: v3.1-dev
+
+Information of 'cmake', 'kconfig', 'kconfig_new' and 'idf.py' is following:
+
+commit: 48c3ad37
+
