Fix some copy-pasta

.github/CONTRIBUTING.md

@@ -43,7 +43,7 @@ If you're using [*direnv*](https://direnv.net), you can automate the creation of
 layout python python$(cat .python-version)
 ```
 
-[Create a fork](https://github.com/hynek/environ-config/fork) of the *structlog* repository and clone it:
+[Create a fork](https://github.com/hynek/environ-config/fork) of the repository and clone it:
 
 ```console
 $ git clone git@github.com:YOU/environ-config.git

README.md

@@ -88,4 +88,4 @@ The development is kindly supported by [Variomedia AG](https://www.variomedia.de
 
 Available as part of the Tidelift Subscription.
 
-The maintainers of *structlog* and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source packages you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact packages you use. [Learn more.](https://tidelift.com/subscription/pkg/pypi-environ-config?utm_source=pypi-environ-config&utm_medium=pypi)
+The maintainers of *environ-config* and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source packages you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact packages you use. [Learn more.](https://tidelift.com/subscription/pkg/pypi-environ-config?utm_source=pypi-environ-config&utm_medium=pypi)

pyproject.toml

@@ -138,7 +138,7 @@ pattern = "\n\n(###.+?\n)## "
 text = """
  ---
 
- [**Full Changelog**](https://www.structlog.org/en/stable/changelog.html)
+ [**Full Changelog**](https://environ-config.readthedocs.io/en/stable/changelog.html)
  """