gateway: bump JamesIves/github-pages-deploy-action from 4.7.4 to 4.7.6

Bumps [JamesIves/github-pages-deploy-action](https://github.com/jamesives/github-pages-deploy-action) from 4.7.4 to 4.7.6.
- [Release notes](https://github.com/jamesives/github-pages-deploy-action/releases)
- [Commits](JamesIves/github-pages-deploy-action@4a3abc7...9d877ee)

---
updated-dependencies:
- dependency-name: JamesIves/github-pages-deploy-action
  dependency-version: 4.7.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/dummy.yml

@@ -25,7 +25,7 @@ jobs:
         if: false
       - uses: DavidAnson/markdownlint-cli2-action@30a0e04f1870d58f8d717450cc6134995f993c63  # v21.0.0
         if: false
-      - uses: JamesIves/github-pages-deploy-action@4a3abc783e1a24aeb44c16e869ad83caf6b4cc23  # v4.7.4
+      - uses: JamesIves/github-pages-deploy-action@9d877eea73427180ae43cf98e8914934fe157a1a  # v4.7.6
         if: false
       - uses: JustinBeckwith/linkinator-action@af984b9f30f63e796ae2ea5be5e07cb587f1bbd9  # v2.3
         if: false