Fix minor documentation issue
Fix minor documentation issue

Merges https://github.com/espressif/esp-idf/pull/6192

Signed-off-by: yiying <9406dd66403d37cc2c703cde89c56221094778ba@MacBook-Air-Cindy.local>

espressif/esp-idf,espressif/esp-idf,espressif/esp-idf,espressif/esp-idf