bug: Fixes mdbook action (#4345)

.github/workflows/usage_guide.yml

@@ -44,8 +44,8 @@ jobs:
         uses: JamesIves/[email protected]
         if: github.event_name == 'push'
         with:
-          destination_dir: usage-guide
-          publish_dir: docs/usage-guide/book
+          target-folder: usage-guide
+          folder: docs/usage-guide/book
 
       - name: Configure AWS credentials
         uses: aws-actions/[email protected]

docs/usage-guide/topics/ch01-api.md

@@ -14,10 +14,6 @@ The [VERSIONING.rst](https://github.com/aws/s2n-tls/blob/main/VERSIONING.rst) do
 
 s2n-tls uses [Doxygen](https://doxygen.nl/index.html) to document its public API. The latest s2n-tls documentation can be found on [GitHub pages](https://aws.github.io/s2n-tls/doxygen/).
 
-Documentation for older versions or branches of s2n-tls can be generated locally. To generate the documentation, install doxygen and run `doxygen docs/doxygen/Doxyfile`. The doxygen documentation can now be found at `docs/doxygen/output/html/index.html`.
-
-Doxygen installation instructions are available at the [Doxygen](https://doxygen.nl/download.html) webpage.
-
 The doxygen documentation should be used in conjunction with this guide.
 
 ## Examples