internal/ci: bump actions/checkout and cue.dev/x/githubactions
As well as bumping the default version for internal/ci/checks.
Ahead of publishing a new version of internal/ci/base.
Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
Change-Id: I8f900404bca843ea42126cfbdcf291545e9c9edf
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1231137
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>
Reviewed-by: Paul Jolly <paul@myitcv.io>