[Docs Site] Bump instantsearch.js from 4.75.4 to 4.75.6 (#18742)

Bumps [instantsearch.js](https://github.com/algolia/instantsearch) from 4.75.4 to 4.75.6.
- [Release notes](https://github.com/algolia/instantsearch/releases)
- [Commits](https://github.com/algolia/instantsearch/compare/[email protected]@4.75.6)

---
updated-dependencies:
- dependency-name: instantsearch.js
  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

@@ -61,7 +61,7 @@
 		"hastscript": "^9.0.0",
 		"he": "^1.2.0",
 		"instantsearch.css": "^8.5.1",
-		"instantsearch.js": "^4.75.4",
+		"instantsearch.js": "^4.75.6",
 		"jsonc-parser": "^3.3.1",
 		"lz-string": "^1.5.0",
 		"marked": "^15.0.3",