Add a missing word in the README file (#2887)

Added the word "you" to the line "It is likely you will need to also update your prettier config."

README.md

@@ -287,7 +287,7 @@ When enabled, this extension will attempt to use global npm or yarn modules if l
 
 A list of [glob patterns](https://code.visualstudio.com/api/references/vscode-api#GlobPattern) to register Prettier formatter. Typically these will be in the format of `**/*.abc` to tell this extension to register itself as the formatter for all files with the `abc` extension. This feature can be useful when you have [overrides](https://prettier.io/docs/en/configuration.html#configuration-overrides) set in your config file to map custom extensions to a parser.
 
-It is likely will need to also update your prettier config. For example, if I register the following document selector by itself, Prettier still won't know what to do with that file. I either need a Prettier extension that formats `.abc` file format or I need to configure Prettier.
+It is likely you will need to also update your prettier config. For example, if I register the following document selector by itself, Prettier still won't know what to do with that file. I either need a Prettier extension that formats `.abc` file format or I need to configure Prettier.
 
 ```json
 {