build(deps): bump rp-pico from 0.2.0 to 0.6.0 in /Firmware-Rust

Bumps [rp-pico](https://github.com/rp-rs/rp-hal-boards) from 0.2.0 to 0.6.0.
- [Release notes](https://github.com/rp-rs/rp-hal-boards/releases)
- [Commits](rp-rs/rp-hal-boards@pimoroni-servo2040-0.2.0...rp-pico-0.6.0)

---
updated-dependencies:
- dependency-name: rp-pico
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Firmware-Rust/Cargo.lock

@@ -16,7 +16,7 @@ embedded-hal = { version = "0.2.6", features=["unproven"] }
 embedded-time = "0.12.0"
 panic-halt = "0.2.0"
 port-expander = "0.3.0"
-rp-pico = "0.2.0"
+rp-pico = "0.6.0"
 shared-bus = "0.2.5"
 
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