Bump actions/download-artifact from 6 to 7 (#988)

* Bump actions/download-artifact from 6 to 7

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update changelog

Signed-off-by: dependabot[bot] <support@github.com>

---------

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

Author: dependabot[bot]

.github/workflows/release-drafter.yml

@@ -50,7 +50,7 @@ jobs:
       contents: write
     steps:
       - name: Retrieve release distributions
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v7
         with:
           name: release-dists
           path: dist

CHANGELOG.md

@@ -18,6 +18,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Bump `actions/checkout` from 5 to 6 ([#986](https://github.com/opensearch-project/opensearch-py/pull/986))
 - Bump `codecov/codecov-action` from 4 to 5 ([#985](https://github.com/opensearch-project/opensearch-py/pull/985))
 - Bump `actions/upload-artifact` from 5 to 6 ([#989](https://github.com/opensearch-project/opensearch-py/pull/989))
+- Bump `actions/download-artifact` from 6 to 7 ([#988](https://github.com/opensearch-project/opensearch-py/pull/988))
 
 ## [3.1.0]
 ### Added