[AUTO] Increment version to 1.3.20.0

[opensearch-trigger-bot[bot]]

• Incremented version to 1.3.20.0.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 72.48%. Comparing base (f779544) to head (4325ce4). Report is 1 commits behind head on 1.3.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 1.3 #2147 +/- ## ======================================= Coverage 72.48% 72.48% ======================================= Files 88 88 Lines 1926 1926 Branches 251 251 ======================================= Hits 1396 1396 Misses 474 474 Partials 56 56 ```

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