docs: Update quick start to clarify the need of extended version (#1828)

Co-authored-by: Joe Mooring <joe@mooring.com>
Co-authored-by: Christian Oliff <christianoliff@pm.me>

content/en/getting-started/quick-start.md

@@ -28,6 +28,8 @@ For other approaches to learning Hugo (like books or video tutorials), refer to
 
 ## Step 1: Install Hugo
 
+Install the **extended version of Hugo** (this is required for the current theme used).
+
 {{% note %}}
 `Homebrew` and `MacPorts`, package managers for `macOS`,  can be installed from [brew.sh](https://brew.sh/) or [macports.org](https://www.macports.org/) respectively. See [install](/getting-started/installing) if you are running Windows etc.
 {{% /note %}}
@@ -42,8 +44,11 @@ To verify your new install:
 
 ```bash
 hugo version
+# Example output: hugo v0.104.2+extended darwin/amd64 BuildDate=unknown
 ```
 
+It should state that it is `extended`. If it does not, uninstall it and try another installation method.
+
 {{< asciicast ItACREbFgvJ0HjnSNeTknxWy9 >}}
 
 ## Step 2: Create a New Site