esp32c6: Update to v0.20.0

Author: AfoHT

examples/esp32c6/Cargo.toml

@@ -17,7 +17,7 @@ esp-backtrace = { version = "0.15.1", features = [
     "println",
 ] }
 
-esp32c6 = {version = "0.19.0", features = ["critical-section"]}
+esp32c6 = {version = "0.20.0", features = ["critical-section"]}
 esp-println = { version = "0.13.1", features = ["esp32c6", "auto"] }
 
 [features]