Update README.md

Author: lostintangent

Diff for: README.md

@@ -2,11 +2,13 @@
 
 This repo template is built to help you get started developing your Azure DevOps-based codebases using Codespaces and Visual Studio. To get started, simply perform the following steps 👍
 
-**From GitHub:**
+**From GitHub.com:**
+
 1. Click the `Use this template` button in order to create a new repo from this template. Name it whatever you'd like!
-1. Open up the `.devcontainer/devcontainer.json` file and replace the `codespace.subRepos.url` property to point at your Azure DevOps repo
+1. Open up the `.devcontainer/devcontainer.json` file and replace the `<url>` placeholder in the `postCreateCommand` property to point at your Azure DevOps repo
 
 **From Visual Studio:**
+
 1. Sign in with your GitHub account
 1. Create a new Codespace using the repo you created above
 1. If needed, you'll be prompted to sign into Azure DevOps