docs: Update faq.mdx (#1758)

grammatical error

website/docs/faq.mdx

@@ -209,7 +209,7 @@ package workspaces) when the lockfile or `package.json` has been modified since
 install ran. If you are running a task and multiple installs are occurring (and it's causing
 issues), it can mean 1 of 2 things:
 
-- If you are using package workspaces, then 1 of the project's triggering the install is not listed
+- If you are using package workspaces, then one of the projects triggering the install is not listed
   within the `workspaces` field in the root `package.json` (for npm and yarn), or in
   `pnpm-workspace.yml` (for pnpm).
 - If the install is triggering in a non-JavaScript related project, then this project is incorrectly