Bump rocm-docs-core from 1.6.2 to 1.7.0 in /docs/sphinx

Bumps [rocm-docs-core](https://github.com/ROCm/rocm-docs-core) from 1.6.2 to 1.7.0.
- [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/v1.6.2...v1.7.0

)

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

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