Update README.md

Author: vshymanskyy

README.md

@@ -30,11 +30,11 @@
 
 ## CoreMark results
 
+- **ESP32-C3** 160MHz: `179.791`
 - **STM32F405** 168MHz: `233.918`
 - **ESP32** 240MHz: `228.363`
 - **ESP32-S3** 240MHz: `271.573`
 - **BL616** 320MHz: `344.293`
-- **BL616** 520MHz: ``
 - **iMXRT1062** 600MHz: `1911.437`
 - **i5-8250U** 1.6GHz: `18696.248`