Update heapless requirement from 0.7 to 0.8 in /examples/rp2040 #21

	on: [push, pull_request]

	name: Examples RP2040 build

	env:
	CARGO_TERM_COLOR: always

	jobs:
	check_format_build:
	name: Examples - Check, Format, Build
	runs-on: ubuntu-latest
	steps:
	#Checkout source
	- name: Checkout sources
	uses: actions/checkout@v4
	#toolchain and tools
	- name: Install stable toolchain
	uses: actions-rs/toolchain@v1
	with:
	toolchain: stable
	target: thumbv6m-none-eabi
	components: rustfmt, clippy
	- name: Install flip-link linker
	run: cargo install flip-link
	#build and lint
	- name: Run cargo check - examples rp2040
	working-directory: ./examples/rp2040/
	run: cargo check
	- name: Run cargo fmt - examples rp2040
	working-directory: ./examples/rp2040/
	run: cargo fmt --all -- --check
	- name: Run cargo clippy - examples rp2040
	working-directory: ./examples/rp2040/
	run: cargo clippy -- -D warnings
	- name: Run cargo build - examples rp2040
	working-directory: ./examples/rp2040/
	run: cargo build

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