Bump VachaShah/backport from 1.1.4 to 2.2.0

Bumps [VachaShah/backport](https://github.com/vachashah/backport) from 1.1.4 to 2.2.0.
- [Release notes](https://github.com/vachashah/backport/releases)
- [Changelog](https://github.com/VachaShah/backport/blob/main/CHANGELOG.md)
- [Commits](VachaShah/backport@28c49d9...142d3b8)

---
updated-dependencies:
- dependency-name: VachaShah/backport
  dependency-version: 2.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/backport.yml

@@ -21,7 +21,7 @@ jobs:
           private-key: ${{ secrets.APP_PRIVATE_KEY }}
 
       - name: Backport
-        uses: VachaShah/backport@28c49d91ceec57d7c9f625f1031c1a4d637251f5 # v1.1.4
+        uses: VachaShah/backport@142d3b8a8c70dc54db515e653e5ed3c3fac64100 # v2.2.0
         with:
           github_token: ${{ steps.app-token.outputs.token }}
           branch_name: backport/backport-${{ github.event.number }}

CHANGELOG.md

@@ -244,6 +244,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ### Dependencies
 
+- Bump `VachaShah/backport` from v1.1.4 to v2.2.0 ([#845](https://github.com/opensearch-project/opensearch-go/pull/845))
 - Bump golangci-lint from v2.11.2 to v2.11.4
 - Bump `golang.org/x/sync` from v0.19.0 to v0.20.0 ([#831](https://github.com/opensearch-project/opensearch-go/pull/831))
 - Bump `golang.org/x/mod` from v0.33.0 to v0.35.0 ([#831](https://github.com/opensearch-project/opensearch-go/pull/831))