Removed greedy matching from a regex to address DOS concern.

[chelma]

Description

• Per the title, removing some greedy matching to mitigate DOS concern

Issues Resolved

• https://tiny.amazon.com/wtrxh53p/sonar

Testing

• Ran the existing unit tests

Check List

• [X] New functionality includes testing
  • [X] All tests pass, including unit test, integration test and doctest
• [ ] New functionality has been documented
• [X] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license. For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov[bot]]

Codecov Report

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

Project coverage is 80.17%. Comparing base (92bee7f) to head (77f8ab6). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1006 +/- ## ============================================ + Coverage 80.16% 80.17% +0.01% - Complexity 2720 2721 +1 ============================================ Files 370 370 Lines 13624 13624 Branches 938 938 ============================================ + Hits 10921 10923 +2 + Misses 2131 2130 -1 + Partials 572 571 -1 ``` | [Flag](https://app.codecov.io/gh/opensearch-project/opensearch-migrations/pull/1006/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | Coverage Δ | | |---|---|---| | [gradle-test](https://app.codecov.io/gh/opensearch-project/opensearch-migrations/pull/1006/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | `78.18% <100.00%> (+0.01%)` | :arrow_up: | | [python-test](https://app.codecov.io/gh/opensearch-project/opensearch-migrations/pull/1006/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | `89.91% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project#carryforward-flags-in-the-pull-request-comment) to find out more.

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