toc:
- column:
  - heading: API r1
    links:
    - label: r1.12 (stable)
      path: /api_docs/python/tf
    - label: r1.11
      path: /versions/r1.11/api_docs/python/tf
    - label: r1.10
      path: /versions/r1.10/api_docs/python/tf
    - label: r1.9
      path: /versions/r1.9/api_docs/python/tf
    - label: r1.8
      path: /versions/r1.8/api_docs/python/tf
    - label: More…
      path: /versions/

  - heading: API r2
    links:
    - label: r2.0 (preview)
      path: /versions/r2.0/api_docs/python/tf

toc:
- column:
  - heading: API r1
    links:
    - label: r1.13 (rc)
      path: /versions/r1.13/api_docs/python/tf
    - label: r1.12 (stable)
      path: /api_docs/python/tf
    - label: r1.11
      path: /versions/r1.11/api_docs/python/tf
    - label: r1.10
      path: /versions/r1.10/api_docs/python/tf
    - label: r1.9
      path: /versions/r1.9/api_docs/python/tf
    - label: More…
      path: /versions/

  - heading: API r2
    links:
    - label: r2.0 (preview)
      path: /versions/r2.0/api_docs/python/tf

Add r1.13 api_docs to api drop-down.
Add r1.13 api_docs to api drop-down.

PiperOrigin-RevId: 230588451
