deprecations in "sync the docs" workflow

[tdyas]

https://github.com/pantsbuild/pantsbuild.org/actions/runs/13659591213/job/38187362969#step:3:12

From "General help JSON" step:

Bootstrapping Pants 2.26.0.dev7
Installing pantsbuild.pants==2.26.0.dev7 into a virtual environment at /home/runner/.cache/nce/6d61748cea187199dc28418157b2121ccbbb44e4af2ee6fddf8c04bbed73f76d/bindings/venvs/2.26.0.dev7
New virtual environment successfully created at /home/runner/.cache/nce/6d61748cea187199dc28418157b2121ccbbb44e4af2ee6fddf8c04bbed73f76d/bindings/venvs/2.26.0.dev7
17:38:43.15 [INFO] Initializing scheduler...
17:38:43.26 [INFO] Scheduler initialized.
17:38:45.86 [WARN] /home/runner/.cache/nce/6d61748cea187199dc28418157b2121ccbbb44e4af2ee6fddf8c04bbed73f76d/bindings/venvs/2.26.0.dev7/lib/python3.11/site-packages/pants/backend/openapi/sample/resources.py:8: DeprecationWarning: read_text is deprecated. Use files() instead. Refer to https://importlib-resources.readthedocs.io/en/latest/using.html#migrating-from-legacy for migration advice.
  PETSTORE_SAMPLE_SPEC = pkg_resources.read_text(sample.__name__, "petstore_spec.yaml")
17:38:45.86 [WARN] /home/runner/.cache/nce/78b1c16a9fd032997ba92a60f46a64f795cd18ff335659dfdf6096df277b24d5/cpython-3.11.9+20240415-x86_64-unknown-linux-gnu-install_only.tar.gz/python/lib/python3.11/importlib/resources/_legacy.py:80: DeprecationWarning: open_text is deprecated. Use files() instead. Refer to https://importlib-resources.readthedocs.io/en/latest/using.html#migrating-from-legacy for migration advice.
  with open_text(package, resource, encoding, errors) as fp:
17:38:46.09 [WARN] DEPRECATED: The autoflake plugin has moved to `pants.backend.python.lint.autoflake` (and from the `fmt` goal to the `fix` goal).
17:38:46.10 [WARN] DEPRECATED: The pyupgrade plugin has moved to `pants.backend.python.lint.pyupgrade` (and from the `fmt` goal to the `fix` goal).
17:38:46.92 [INFO] Initialization options changed: reinitializing scheduler...