docs: added missing "install" (#2828)

added missing "install" in command for installing esy@latest

docs/docs/for-developers/building.md

@@ -11,7 +11,7 @@ sidebar_label: Building from Source
 - Install [Git](https://git-scm.com/)
 - Install [Node](https://nodejs.org/en)
 - Install [Esy](https://esy.sh) (__0.6.2__ or above is required, but the latest version is recommened: `npm install -g esy@latest`)
-> __NOTE:__ **Linux-only**: if you need to install using `sudo npm -g esy@latest` then your NPM installation **might be broken** follow [the instruction here to fix it](https://docs.npmjs.com/resolving-eacces-permissions-errors-when-installing-packages-globally) this is related to this issue [esy/esy#1099.](https://github.com/esy/esy/issues/1099)
+> __NOTE:__ **Linux-only**: if you need to install using `sudo npm install -g esy@latest` then your NPM installation **might be broken** follow [the instruction here to fix it](https://docs.npmjs.com/resolving-eacces-permissions-errors-when-installing-packages-globally) this is related to this issue [esy/esy#1099.](https://github.com/esy/esy/issues/1099)
 
 - __Windows-only__: Run `npm install -g windows-build-tools` (this installs some build tools that aren't included by default on Windows)
 - Install any other system packages required by Oni2 dependencies, as outlined below.