docs(opensearch): remove duplicate words

[mazyu36]

I deleted the duplicate into a.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.86%. Comparing base (e867b94) to head (974f395).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #32593   +/-   ##
=======================================
  Coverage   78.86%   78.86%           
=======================================
  Files         108      108           
  Lines        7165     7165           
  Branches     1319     1319           
=======================================
  Hits         5651     5651           
  Misses       1330     1330           
  Partials      184      184           

Flag	Coverage Δ
suite.unit	78.86% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	78.86% <ø> (ø)

[kaizencc]

Thanks!

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 974f395
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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