Added note about choco being out-of-date with its Fira Code package

Installing.md

@@ -41,6 +41,7 @@ In the [downloaded TTF folder](https://github.com/tonsky/FiraCode/tree/master/di
 *or*
 
 - Use [chocolatey](https://chocolatey.org): `choco install firacode-ttf`
+
 _Note: chocolately will install Fira Code 2.0; the current version is 3.1_
 
 - Use [scoop](https://github.com/lukesampson/scoop):