starters: standardise starters dir name to templates

templates/documentation/content/docs/guide/shortcodes/toggle.md

@@ -0,0 +1,27 @@
+---
+title: Spoiler
+---
+
+A Hugo shortcode to toggle collapsible content.
+
+<!--more-->
+
+## Example
+
+{{< spoiler text="Click to view the spoiler" >}}
+You found me!
+
+Markdown is **supported**.
+{{< /spoiler >}}
+
+## Usage
+
+````
+{{</* spoiler text="Click to view the spoiler" */>}}
+
+This is the content of the details.
+
+Markdown is **supported**.
+
+{{</* /spoiler */>}}
+````