Downgrade TypeScript version to remove eslint warning.

[dblock]

Description

Currently you see

> eslint . --report-unused-disable-directives

=============

WARNING: You are currently running a version of TypeScript which is not officially supported by @typescript-eslint/typescript-estree.

You may find that it works just fine, or you may not.

SUPPORTED TYPESCRIPT VERSIONS: >=4.3.5 <5.4.0

YOUR TYPESCRIPT VERSION: 5.4.5

Please only submit bug reports when using the officially supported version.

=============

I wasn't able to find a set of compatible libraries that upgrade eslint, but downgrading by one seems harmless.

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.

[github-actions]

Changes Analysis

Commit SHA: d0e28a5
Comparing To SHA: 16bcb63

API Changes

Summary

NO CHANGES

Report

The full API changes report is available at: https://github.com/opensearch-project/opensearch-api-specification/actions/runs/9582661711/artifacts/1617099657

API Coverage

	Before	After	Δ
Covered (%)	483 (47.31 %)	483 (47.31 %)	0 (0 %)
Uncovered (%)	538 (52.69 %)	538 (52.69 %)	0 (0 %)
Unknown	24	24	0