Bump rocm-docs-core from 1.26.0 to 1.29.0 in /docs/sphinx (#2051)

Bumps [rocm-docs-core](https://github.com/ROCm/rocm-docs-core) from 1.26.0 to 1.29.0.
- [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/v1.26.0...v1.29.0)

---
updated-dependencies:
- dependency-name: rocm-docs-core
  dependency-version: 1.29.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: corey-derochie-amd <161367113+corey-derochie-amd@users.noreply.github.com>

[ROCm/rccl commit: 131900c264]

projects/rccl/docs/sphinx/requirements.in

@@ -1 +1 @@
-rocm-docs-core==1.26.0
+rocm-docs-core==1.29.0

projects/rccl/docs/sphinx/requirements.txt

@@ -187,7 +187,7 @@ requests==2.32.4
     # via
     #   pygithub
     #   sphinx
-rocm-docs-core==1.26.0
+rocm-docs-core==1.29.0
     # via -r requirements.in
 rpds-py==0.22.3
     # via