Update CONTRIBUTING.md

packages/react-devtools/CONTRIBUTING.md

@@ -18,13 +18,15 @@ yarn install
 # Build React and React DOM
 Next, check out (or build) the local version of React that DevTools uses:
 
-### Option 1 (fastest): Checkout DevTools dependencies
+### Option 1 (fastest): Checkout pre-built React
+To check out the latest version of React (built by CI from the `main` branch) run:
 ```sh
 cd <react-repo>
 scripts/release/download-experimental-build.js --commit=main
 ```
 
-### Option 2 (if you've ade local changes to react): Build from source
+### Option 2: Build from source
+If your DevTools change includes local changes to React (or if CI is down for some reason) you can also build from source:
 ```sh
 cd <react-repo>
 yarn build-for-devtools
@@ -62,4 +64,4 @@ yarn build:chrome && yarn test:chrome --url=<url-to-test>
 ```
 
 # Finding the right first issue
-The React team maintains [this list of "good first issues"](https://github.com/facebook/react/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22Component%3A+Developer+Tools%22+label%3A%22good+first+issue%22) for anyone interested in contributing to DevTools. If you see one that interests you, leave a comment!
+The React team maintains [this list of "good first issues"](https://github.com/facebook/react/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22Component%3A+Developer+Tools%22+label%3A%22good+first+issue%22) for anyone interested in contributing to DevTools. If you see one that interests you, leave a comment!