[AUTO] Increment version to 2.19.4.

[opensearch-trigger-bot]

I've noticed that a new tag 2.19.3 was pushed, and incremented the version from 2.19.3 to 2.19.4.

[github-actions]

❌ Gradle check result for 31f411a: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for b688b19: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for b688b19: null

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

✅ Gradle check result for c3ff53b: SUCCESS

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.00%. Comparing base (cf5e1dc) to head (06709da).
⚠️ Report is 2 commits behind head on 2.19.

Additional details and impacted files

@@             Coverage Diff              @@
##               2.19   #18835      +/-   ##
============================================
+ Coverage     71.91%   72.00%   +0.09%     
- Complexity    65988    66040      +52     
============================================
  Files          5341     5341              
  Lines        307243   307244       +1     
  Branches      44838    44838              
============================================
+ Hits         220942   221233     +291     
+ Misses        67875    67630     -245     
+ Partials      18426    18381      -45     

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[github-actions]

✅ Gradle check result for 06709da: SUCCESS