CI Dependency: Bump actions/checkout from 4 to 6 #467

Job	Run time
Makefile / Assert PR branch is ahead	6s
CI matrix / Assert PR branch is ahead	5s
CI matrix / Lint codebase (go-ci-oldstable, false)	38s
CI matrix / Run tests (go-ci-oldstable, false)	32s
CI matrix / Run tests (go-ci-stable, false)	31s
CI matrix / Lint codebase (go-ci-unstable, true)	34s
CI matrix / Run tests (go-ci-unstable, true)	35s
CI matrix / Lint codebase (go-ci-stable, false)	42s
CI matrix / Evaluate loopvar scoping changes	27s
CI matrix / Build codebase (go-ci-oldstable, false)	30s
CI matrix / Build codebase (go-ci-stable, false)	32s
CI matrix / Build codebase (go-ci-unstable, true)	32s
CI matrix / Optional Linting / Assert PR branch is ahead	7s
Makefile / Build codebase using Makefile quick recipe	34s
Makefile / Build codebase using Makefile all recipe	0s
Makefile / Lint codebase using Makefile	0s
CI matrix / Optional Linting / Lint codebase using optional linters (go-ci-unstable, true)	21s
CI matrix / Optional Linting / Lint codebase using optional linters (go-ci-stable, true)	20s
CI matrix / Optional Linting / Lint codebase using optional linters (go-ci-oldstable, true)	22s
	7m 28s

Provide feedback