Upgrade actions/cache to from ver. 3 to 4 #3

	name: Coverage

	on:
	push:
	branches: [ master ]
	paths:
	- '*/.cpp'
	- '*/.hpp'
	- 'CMakeLists.txt'
	- 'cmake/Coverage.cmake'
	- '.github/workflows/coverage.yml'

	jobs:
	coverage:
	name: Coverage Report
	runs-on: ubuntu-latest
	env:
	CMAKE_C_COMPILER_LAUNCHER: ccache
	CMAKE_CXX_COMPILER_LAUNCHER: ccache
	CCACHE_DIR: ${{ github.workspace }}/.ccache

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	with: { fetch-depth: 0 }

	- name: Install CMake and Ninja
	uses: lukka/get-cmake@latest
	with:
	cmakeVersion: ^3.28.0
	ninjaVersion: ^1.11.0

	- name: Install dependencies
	run: \|
	sudo apt-get -qq update
	sudo apt install -y gcc g++ ccache gcovr lcov

	- name: Cache ccache
	uses: actions/cache@v4
	with:
	path: $CACHE_DIR
	key: ${{ runner.os }}-ccache-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-ccache-

	- name: Cache build directory
	uses: actions/cache@v4
	with:
	path: build/
	key: ${{ runner.os }}-build-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-build-

	- name: Configure → Build → Test (Coverage)
	run: cmake --workflow --preset coverage-report

	- name: Generate coverage XML
	run: cmake --build --preset gcc-Coverage --target coverage

	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v3
	with:
	files: build/gcc-Coverage/coverage.xml
	token: ${{ secrets.CODECOV_TOKEN }}
	fail_ci_if_error: true

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