[Docs Site] Bump react-instantsearch from 7.15.7 to 7.15.8 (#22991)

Bumps [react-instantsearch](https://github.com/algolia/instantsearch) from 7.15.7 to 7.15.8.
- [Release notes](https://github.com/algolia/instantsearch/releases)
- [Commits](https://github.com/algolia/instantsearch/compare/[email protected]@7.15.8)

---
updated-dependencies:
- dependency-name: react-instantsearch
  dependency-version: 7.15.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -98,7 +98,7 @@
 		"react": "19.0.0",
 		"react-dom": "19.0.0",
 		"react-icons": "5.5.0",
-		"react-instantsearch": "7.15.7",
+		"react-instantsearch": "7.15.8",
 		"react-markdown": "10.1.0",
 		"react-select": "5.10.1",
 		"redirects-in-workers": "0.0.7",