update to defmt 1.0

`defmt` released v1.0 and used the semver trick (releasing v0.3.100) to
make updating to it non-breaking.

Author: rursprung

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 <!-- next-header -->
 ## [Unreleased] - ReleaseDate
+### Changed
+
+* Updated to `defmt` 1.0 (non-breaking change, backwards compatible with 0.3 through semver trick)
 
 ## [1.0.0] - 2024-10-13
 ### Added

Cargo.toml

@@ -11,7 +11,7 @@ keywords = ["adafruit", "bluefruit", "bluetooth", "protocol"]
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-defmt = { version = "0.3", optional = true }
+defmt = { version = "1.0", optional = true }
 
 rgb = { version = "0.8", optional = true }
 serde = { version = "1.0", features = ["derive"], optional = true }