ubuntu-latest pipelines will use ubuntu-24.04 soon. For more details, see https://github.com/actions/runner-images/issues/10636

The documentation for prompt caching is duplicated between `context.md` and a new file `prompt-caching.mdx`. This redundancy can be avoided by linking to the existing content or consolidating it in one place.

The frontmatter in `prompt-caching.mdx` is not necessary since it's a standalone document and does not need to be included in the sidebar or have a title. This can be removed to simplify the file.

The section on `ephemeral` is duplicated between `context.md` and `prompt-caching.mdx`. This redundancy can be avoided by linking to the existing content or consolidating it in one place.