ghaw: bump actions/checkout from 3 to 4 #194

Job	Run time
CI matrix / Assert PR branch is ahead	4s
Makefile / Assert PR branch is ahead	17s
CI matrix / Lint codebase (go-ci-oldstable, false)	49s
CI matrix / Lint codebase (go-ci-stable, false)	48s
CI matrix / Lint codebase (go-ci-unstable, true)	40s
CI matrix / Run tests (go-ci-oldstable, false)	56s
CI matrix / Run tests (go-ci-stable, false)	34s
CI matrix / Run tests (go-ci-unstable, true)	49s
CI matrix / Build codebase (go-ci-oldstable, false)	40s
CI matrix / Build codebase (go-ci-stable, false)	37s
CI matrix / Build codebase (go-ci-unstable, true)	38s
CI matrix / Optional Linting / Assert PR branch is ahead	4s
Makefile / Lint codebase using Makefile	0s
Makefile / Build codebase using Makefile quick recipe	38s
Makefile / Build codebase using Makefile all recipe	0s
CI matrix / Optional Linting / Lint codebase using optional linters (go-ci-oldstable, true)	41s
CI matrix / Optional Linting / Lint codebase using optional linters (go-ci-stable, true)	46s
CI matrix / Optional Linting / Lint codebase using optional linters (go-ci-unstable, true)	46s
	9m 47s

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