[rocm-libraries] ROCm/rocm-libraries#6326 (commit c1b6c3e)

Correct .readthedocs.yml file path (#6326)

## Motivation

Read the Docs config files contains outdated file path from their legacy
repos. Update and correct all paths.

## Technical Details

## Test Plan

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## Test Result

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## Submission Checklist

- [x] Look over the contributing guidelines at
https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.