[v2] "post" steps are executed in a random order

[AkihiroSuda]

https://github.com/reproducible-containers/buildkit-cache-dance/actions/runs/6175782567/job/16763351153

Post inject var-lib-apt into docker is executed before Post Cache var-lib-apt, but Post inject var-cache-apt is executed after Post Cache var-cache-apt

buildkit-cache-dance/.github/workflows/test.yml

Lines 17 to 36 in 0db49bb

	- name: Cache var-cache-apt
	uses: actions/cache@v3
	with:
	path: var-cache-apt
	key: var-cache-apt-${{ hashFiles('.github/workflows/test/Dockerfile') }}
	- name: Cache var-lib-apt
	uses: actions/cache@v3
	with:
	path: var-lib-apt
	key: var-lib-apt-${{ hashFiles('.github/workflows/test/Dockerfile') }}
	- name: inject var-cache-apt into docker
	uses: ./
	with:
	cache-source: var-cache-apt
	cache-target: /var/cache/apt
	- name: inject var-lib-apt into docker
	uses: ./
	with:
	cache-source: var-lib-apt
	cache-target: /var/lib/apt

[AkihiroSuda]

Possibly relevant:

• Step Order value for Post Steps can be incorrect if a job contains composite actions actions/runner#1657
• Support pre and post steps in Composite Actions actions/runner#1478 (comment)

[AkihiroSuda]

Fixed in #4 (v2.1.0)