Bump rocm-docs-core[api_reference] from 1.9.0 to 1.9.1 in /docs/sphinx

Bumps [rocm-docs-core[api_reference]](https://github.com/ROCm/rocm-docs-core) from 1.9.0 to 1.9.1.
- [Release notes](https://github.com/ROCm/rocm-docs-core/releases)
- [Changelog](https://github.com/ROCm/rocm-docs-core/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/ROCm/rocm-docs-core/compare/v1.9.0...v1.9.1)

---
updated-dependencies:
- dependency-name: rocm-docs-core[api_reference]
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

docs/sphinx/requirements.in

@@ -1 +1 @@
-rocm-docs-core[api_reference]==1.9.0
+rocm-docs-core[api_reference]==1.9.1

docs/sphinx/requirements.txt

@@ -132,7 +132,7 @@ requests==2.32.3
     # via
     #   pygithub
     #   sphinx
-rocm-docs-core[api-reference]==1.9.0
+rocm-docs-core[api-reference]==1.9.1
     # via -r requirements.in
 six==1.16.0
     # via python-dateutil