Merge pull request #61373 from apple/maxd/ubuntu-2204-gs-md

docs: link to Ubuntu 22.04 deps in `GettingStarted.md`

Author: swift-ci

docs/HowToGuides/GettingStarted.md

@@ -154,6 +154,7 @@ Double-check that running `pwd` prints a path ending with `swift`.
 
 1. The latest Linux dependencies are listed in the respective Dockerfiles:
    * [Ubuntu 20.04](https://github.com/apple/swift-docker/blob/main/swift-ci/master/ubuntu/20.04/Dockerfile)
+   * [Ubuntu 22.04](https://github.com/apple/swift-docker/blob/main/swift-ci/master/ubuntu/22.04/Dockerfile)
    * [CentOS 7](https://github.com/apple/swift-docker/blob/main/swift-ci/master/centos/7/Dockerfile)
    * [Amazon Linux 2](https://github.com/apple/swift-docker/blob/main/swift-ci/master/amazon-linux/2/Dockerfile)