Fix java version for publishing maven snapshots

[gaiksaya]

Description

Fix java version for publishing maven snapshots

Related Issues

https://github.com/opensearch-project/performance-analyzer/actions/runs/16891156572/job/47851002798

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.01%. Comparing base (9cb092f) to head (344dcc0).
⚠️ Report is 40 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #835      +/-   ##
============================================
- Coverage     70.88%   70.01%   -0.87%     
- Complexity      421      489      +68     
============================================
  Files            49       54       +5     
  Lines          3125     3518     +393     
  Branches        194      228      +34     
============================================
+ Hits           2215     2463     +248     
- Misses          785      911     +126     
- Partials        125      144      +19     

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