Fix servereReadyAction typo. (#3384)

Author: lewishenson

debugger-launchjson.md

@@ -62,7 +62,7 @@ Notes about this:
     Code, and it also allows using a script debugger. You can continue using `launchBrowser` instead 
     if none of those features are important to you. You also can continue to use `launchBrowser` if
     you want to run a specific program instead of starting the default browser.
-4. More documentation for `servereReadyAction` can be found in the [Visual Studio Code February 2019 release notes](https://code.visualstudio.com/updates/v1_32#_automatically-open-a-uri-when-debugging-a-server-program).
+4. More documentation for `serverReadyAction` can be found in the [Visual Studio Code February 2019 release notes](https://code.visualstudio.com/updates/v1_32#_automatically-open-a-uri-when-debugging-a-server-program).
 5. The way this works is that VS Code will scrape the output which is set to the console. If a line 
     matches the pattern, it will launch a browser against the URL which was 'captured' by the pattern.
     Here is an explanation of what the pattern does: