Update embedded-hal requirement in /rtic_v1/stm32l4_heartbeat

Updates the requirements on [embedded-hal](https://github.com/rust-embedded/embedded-hal) to permit the latest version.
- [Release notes](https://github.com/rust-embedded/embedded-hal/releases)
- [Commits](rust-embedded/embedded-hal@v0.2.6...embedded-hal-v1.0.0)

---
updated-dependencies:
- dependency-name: embedded-hal
  dependency-type: direct:production
...

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

rtic_v1/stm32l4_heartbeat/Cargo.toml

@@ -13,7 +13,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-embedded-hal = "0.2.6"
+embedded-hal = "1.0.0"
 cortex-m-rtic = "1.0.0"
 stm32l4xx-hal = { version = "0.7.1", features = ["rt", "stm32l412"] }
 heapless = "0.8.0"