chore(deps): update esp32c6 requirement from 0.19.0 to 0.20.0

---
updated-dependencies:
- dependency-name: esp32c6
  dependency-version: 0.20.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

rtic-monotonics/Cargo.toml

@@ -68,7 +68,7 @@ stm32-metapac = { version = "15.0.0", optional = true }
 imxrt-ral = { version = "0.6.1", optional = true }
 
 esp32c3 = {version = "0.29.0", optional = true }
-esp32c6 = {version = "0.19.0", optional = true }
+esp32c6 = {version = "0.20.0", optional = true }
 riscv = {version = "0.14.0", optional = true }
 
 [build-dependencies]

rtic/Cargo.toml

@@ -27,7 +27,7 @@ name = "rtic"
 [dependencies]
 riscv-slic = { version = "0.2.0", optional = true }
 esp32c3 = { version = "0.29.0", optional = true }
-esp32c6 = { version = "0.19.0", optional = true }
+esp32c6 = { version = "0.20.0", optional = true }
 riscv = { version = "0.14.0", optional = true }
 cortex-m = { version = "0.7.0", optional = true }
 bare-metal = "1.0.0"