update docs/index.rst

diff --git a/docs/index.rst b/docs/index.rst
index 829ce0334ee33baba5f0f1587acd2666083ef569..6858bdfbdcf42a65d467d86103a4ca918088cfc1 100644 (file)
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -102,6 +102,7 @@ Contents:
    api/uart
    api/ledc
    api/rmt
+   Pulse Counter <api/pcnt>
    SPI Flash and Partition APIs <api/spi_flash>
    Logging <api/log>
    Non-Volatile Storage <api/nvs_flash>