Fix invalid sonar warning related to other version of java

[c71n93]

Related to #2251

The problem was with this sonar check. This problem should not have occurred, because in our project we use the java 8 version, but the close method in the ExecutorService is implemented only in java 19.

Before I tried to change java version using sonar.java.source (#2900) but it didn't help.

According to this issue the only way to make analysis work for specific java version is to use jdk of this particular version.

I tried this on my on my fork of eo and it worked:

• this is result of workflow before changing version https://github.com/c71n93/eo/actions/runs/9190608753/job/25275192434
• and this is after https://github.com/c71n93/eo/actions/runs/9191135531/job/25276898445

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PR-Codex overview

This PR updates the Java version from 20 to 17 in the Sonar workflow.

Detailed summary

• Updated Java version in Sonar workflow from 20 to 17.

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[c71n93]

@yegor256 could you check this one, please?

[c71n93]

@yegor256 could you check this one, please?

[yegor256]

@c71n93 thanks