Docs: github-action.md: fix wording

Author: lolmaus

docs/github-action.md

@@ -2,7 +2,7 @@
 
 The Dev Container Build and Run GitHub Action is aimed at making it easier to re-use [Dev Containers](https://containers.dev) in a GitHub workflow. The Action supports using a Dev Container to run commands for CI, testing, and more along with pre-building Dev Container image. Dev Container image building supports [Dev Container Features](https://containers.dev/implementors/features/#devcontainer-json-properties) and automatically places Dev Container [metadata on an image](https://containers.dev/implementors/spec/#image-metadata) label for simplified use.
 
-> **NOTE:** This Action cannot currently take advantage of [pre-built Codespaces](https://docs.github.com/en/codespaces/prebuilding-your-codespaces/about-github-codespaces-prebuilds). However, you can create or use pre-built container images are supported.
+> **NOTE:** This Action cannot currently take advantage of [pre-built Codespaces](https://docs.github.com/en/codespaces/prebuilding-your-codespaces/about-github-codespaces-prebuilds). However, you can create or use pre-built container images.
 
 ##  Getting Started