Update sphinx requirement from <7.2 to <7.3 (#480)

* Update sphinx requirement from <7.2 to <7.3

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](https://github.com/sphinx-doc/sphinx/compare/v0.1.61611...v7.2.2)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

* Update changelog

Signed-off-by: dependabot[bot] <[email protected]>

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: dependabot[bot] <dependabot[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -11,7 +11,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Fixed race condition in AWSV4SignerAuth & AWSV4SignerAsyncAuth when using refreshable credentials ([#470](https://github.com/opensearch-project/opensearch-py/pull/470))
 ### Security
 ### Dependencies
-- Bumps `sphinx` from <7.1 to <7.2
+- Bumps `sphinx` from <7.1 to <7.3
 - Bumps `urllib3` from >=1.21.1, <2 to >=1.21.1 ([#466](https://github.com/opensearch-project/opensearch-py/pull/466))
 
 ## [2.3.0]
@@ -116,4 +116,4 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 [2.1.0]: https://github.com/opensearch-project/opensearch-py/compare/v2.0.1...v2.1.0
 [2.1.1]: https://github.com/opensearch-project/opensearch-py/compare/v2.1.0...v2.1.1
 [2.2.0]: https://github.com/opensearch-project/opensearch-py/compare/v2.1.1...v2.2.0
-[2.3.0]: https://github.com/opensearch-project/opensearch-py/compare/v2.2.0...v2.3.0
+[2.3.0]: https://github.com/opensearch-project/opensearch-py/compare/v2.2.0...v2.3.0

dev-requirements.txt

@@ -3,7 +3,7 @@ pytest
 pytest-cov
 coverage
 mock
-sphinx<7.2
+sphinx<7.3
 sphinx_rtd_theme
 jinja2
 pytz