Update actions/checkout action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v2 -> v4

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Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

• Check out other refs/* by commit if provided, fall back to ref by @​orhantoy in https://github.com/actions/checkout/pull/1924

v3

Compare Source

• Fix: Mark test scripts with Bash'isms to be run via Bash
• Add option to fetch tags even if fetch-depth > 0

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[yegor256]

@rultor please, try to merge, since 1 checks have passed

[rultor]

@rultor please, try to merge, since 1 checks have passed

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor please, try to merge, since 1 checks have passed

@renovate[bot] @yegor256 Oops, I failed. You can see the full log here (spent 12s)

+ set -e
+ set -o pipefail
++ dirname ./run.sh
+ cd .
+ echo 3762149
+ echo '2.0-SNAPSHOT BUILD'
2.0-SNAPSHOT BUILD
+ date
Mon 04 Sep 2023 11:23:23 PM CEST
+ uptime
 23:23:23 up 285 days,  4:01,  0 users,  load average: 2.08, 1.87, 2.56
+ cat
com.rultor.spi.Profile: There is no 'merge' section in .rultor.yml for branch master in repo yegor256/jo
	at com.rultor.agents.req.StartsRequest.docker(StartsRequest.java:350)
	at com.rultor.agents.req.StartsRequest.vars(StartsRequest.java:255)
	at com.rultor.agents.req.StartsRequest.script(StartsRequest.java:148)
	at com.rultor.agents.req.StartsRequest.process(StartsRequest.java:109)
	at com.rultor.agents.AbstractAgent.execute(AbstractAgent.java:75)
	at com.rultor.spi.Agent.execute(Agent.java:84)
	at com.rultor.agents.VerboseAgent.execute(VerboseAgent.java:62)
	at com.rultor.Routine.process(Routine.java:202)
	at com.rultor.Routine.unsafe_aroundBody0(Routine.java:180)
	at com.rultor.Routine.run(Routine.java:1)
	at org.aspectj.runtime.reflect.JoinPointImpl.proceed(JoinPointImpl.java:179)
	at com.jcabi.aspects.aj.MethodInterrupter.wrap(MethodInterrupter.java:108)
	at com.rultor.Routine.unsafe(Routine.java:175)
	at com.rultor.Routine.run(Routine.java:142)
	at com.jcabi.log.VerboseRunnable.run(VerboseRunnable.java:190)
	at com.jcabi.aspects.aj.MethodScheduler.lambda./run.sh(MethodScheduler.java:194)
	at java.base/java.util.concurrent.Executors.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor.run(ScheduledThreadPoolExecutor.java:305)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor.run(ThreadPoolExecutor.java:635)
	at com.jcabi.log.VerboseThreads.run(VerboseThreads.java:222)
	at java.base/java.lang.Thread.run(Thread.java:833)

+ exit -1
'cid' file is absent, most probably the Docker container wasn't started correctly