build(deps): bump actions/checkout from 3 to 4 #20

Job	Run time
cache-build-deps	1m 33s
snap-builds (default, pristine)	8m 7s
snap-builds (default, test)	8m 30s
snap-builds (FIPS, pristine)	8m 22s
snap-builds (FIPS, test)	8m 6s
branch-static-checks	15s
static-checks (1.18)	4m 37s
static-checks (latest/stable)	3m 55s
unit-tests (1.18, normal)	4m 59s
unit-tests-cross-distro (fedora:39)	7m 10s
unit-tests (latest/stable, normal)	5m 14s
unit-tests-special (1.18, snapd_debug)	5m 3s
unit-tests-cross-distro (opensuse/tumbleweed)	5m 36s
unit-tests-special (1.18, withbootassetstesting)	5m 21s
unit-tests-special (1.18, nosecboot)	5m 33s
unit-tests-special (1.18, faultinject)	4m 53s
unit-tests-special (1.18, race)	9m 44s
unit-tests-special (1.18, snapdusergo)	5m 21s
unit-tests-special (latest/stable, snapd_debug)	5m 44s
unit-tests-special (latest/stable, withbootassetstesting)	5m 59s
unit-tests-special (latest/stable, nosecboot)	5m 35s
unit-tests-special (latest/stable, faultinject)	5m 20s
unit-tests-special (latest/stable, race)	9m 49s
unit-tests-special (latest/stable, snapdusergo)	5m 19s
${{ matrix.group }}	0s
code-coverage	7s
	2h 20m 12s

Provide feedback