Thank @attilaolah in the README; bump to 3.0.1

PyPI only shows the README from the latest release, so the acknowledgement
needs a release to appear on the diffbot project page.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: shixish

README.md

@@ -372,3 +372,7 @@ environment variable or `~/.diffbot/credentials`:
 ```bash
 DIFFBOT_API_TOKEN=your_token python -m pytest -m live
 ```
+
+## Acknowledgements
+
+Thanks to [@attilaolah](https://github.com/attilaolah), who published the original `diffbot` package in 2012 and looked after the name for 14 years before handing it over.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "diffbot"
-version = "3.0.0"
+version = "3.0.1"
 description = "Python client library for Diffbot APIs"
 readme = "README.md"
 requires-python = ">=3.9"