Bump rocm-docs-core from 1.14.1 to 1.15.0 in /docs/sphinx (#1514)

Bumps [rocm-docs-core](https://github.com/ROCm/rocm-docs-core) from 1.14.1 to 1.15.0.
- [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/v1.14.1...v1.15.0)

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

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

[ROCm/rccl commit: ad8012f2fc]

projects/rccl/docs/sphinx/requirements.in

@@ -1 +1 @@
-rocm-docs-core==1.14.1
+rocm-docs-core==1.15.0

projects/rccl/docs/sphinx/requirements.txt

@@ -188,7 +188,7 @@ requests==2.32.2
     # via
     #   pygithub
     #   sphinx
-rocm-docs-core==1.14.1
+rocm-docs-core==1.15.0
     # via -r requirements.in
 rpds-py==0.22.3
     # via