updated .devcontainer.json route

Author: dmalan

cs50.dev.md

@@ -38,8 +38,7 @@ If using Firefox, [disable Enhanced Tracking Protection](https://support.mozilla
 
 ### Shortcuts
 
-* Visit [cs50.dev/devcontainer.json](https://cs50.dev/devcontainer.json) for the latest version of CS50's `devcontainer.json` template.
-* Visit [https://github.com/cs50/codespace/blob/develop/devcontainer.json](https://github.com/cs50/codespace/blob/develop/devcontainer.json) for the latest version of CS50's `devcontainer.json` used in building the Codespace image.
+* Visit [cs50.dev/.devcontainer.json](https://cs50.dev/.devcontainer.json) for the latest version of CS50's `.devcontainer.json` template.
 * Visit [cs50.dev/codespaces](https://cs50.dev/codespaces) to access your codespaces in CS50's GitHub organization.
 * Visit [cs50.dev/commits](https://cs50.dev/commits) to access all of the commits that have been pushed to your repository in CS50's GitHub organization.
 * Visit [cs50.dev/repo](https://cs50.dev/repo) to access your repository in CS50's GitHub organization.
@@ -81,7 +80,7 @@ Alternatively still, if already logged into a codespace, open the codespace's [c
 
 To use VS Code locally with Docker, running a [codespace-like container](https://code.visualstudio.com/docs/remote/containers) on your own computer, even without internet access, and opening a folder like `foo` therein:
 
-1. Download CS50's latest `.devcontainer.json` file from [https://cs50.dev/devcontainer.json](https://cs50.dev/devcontainer.json), saving it in `foo`. Because the file's name starts with a dot (i.e., period), it might seem to "disappear" when you download it. But, in a terminal window on Linux or macOS, you should see it with `ls -a`, and at a command prompt in Windows, you should see it with `dir /a`.
+1. Download CS50's latest `.devcontainer.json` file from [https://cs50.dev/.devcontainer.json](https://cs50.dev/.devcontainer.json), saving it in `foo`. Because the file's name starts with a dot (i.e., period), it might seem to "disappear" when you download it. But, in a terminal window on Linux or macOS, you should see it with `ls -a`, and at a command prompt in Windows, you should see it with `dir /a`.
 1. Download, install, and start [Docker](/docker/) on your computer.
 1. Download and install [VS Code](https://code.visualstudio.com/download) itself on your computer.
 1. Install VS Code's [Dev Containers](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers) extension.