Add trailing slash guidance (#436)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Jack Baldry <[email protected]>

docs/sources/write/links/index.md

@@ -60,7 +60,7 @@ cascade:
 
 **Link to Grafana documentation**:
 
-Start with `https://grafana.com/docs/grafana/<GRAFANA_VERSION>/`, and add the rest of the URL path.
+Start with `https://grafana.com/docs/grafana/<GRAFANA_VERSION>/`, and add the rest of the URL path. Include trailing slashes.
 
 For example, to link to the [Developers](https://grafana.com/docs/grafana/latest/developers) page with version substitution, use:
 
@@ -97,7 +97,7 @@ https://grafana.com/docs/mimir/<MIMIR_VERSION>/release-notes/
 
 ## Link to external pages
 
-Use the full URL.
+Use the full URL. Copy the URL as it is from the address bar. If it includes a trailing slash, include it; if it doesn't, don't.
 
 For example:
 
@@ -121,6 +121,8 @@ From a different page:
 Read more in the [Grafana Open Source section of the Introduction page](https://grafana.com/docs/grafana/<GRAFANA_VERSION>/fundamentals/#grafana-open-source).
 ```
 
+Include the trailing slash before the hash (#) that precedes the page heading.
+
 To convert a heading to an anchor, make the following changes:
 
 1. Convert to lower case.

docs/sources/write/shortcodes/index.md

@@ -657,6 +657,7 @@ The content within the shortcode tags is as follows:
 - _`REFERENCE`_ - The path to the destination file.
   This shortcode supports version substitution using values like `<GRAFANA VERSION>`.
   To learn about version substitution, refer to [About version substitution](#about-version-substitution).
+  Don't include trailing slashes in the path.
 
 Then add the link in the body of the file in the following format: