Replace links to variable pages with links to method pages

See #2196

content/en/methods/shortcode/Scratch.md

@@ -16,7 +16,7 @@ The `Scratch` method within a shortcode creates a [scratch pad] to store and man
 With the introduction of the [`newScratch`] function, and the ability to [assign values to template variables] after initialization, the `Scratch` method within a shortcode is obsolete.
 
 [assign values to template variables]: https://go.dev/doc/go1.11#text/template
-[`newScratch`]: functions/collections/newscratch
+[`newScratch`]: /functions/collections/newscratch/
 {{% /note %}}
 
 [scratch pad]: /getting-started/glossary/#scratch-pad