Update configuration.md for giscus template

Mentioned where to get the template file for Giscus setup.

content/posts/configuration.md

@@ -88,8 +88,10 @@ Enables or disables the comment system for posts.
 - Default: false
 - Usage: `comment = false`
 
+After making `comment = true` save your script from [Giscus](https://giscus.app) to `templates/_giscus_script.html`.
 When enabled, this allows readers to leave comments on your blog posts.
 
+
 ## Fancy Code Styling (`fancy_code`)
 
 Enables enhanced styling for code blocks.
@@ -127,4 +129,4 @@ The `repo_url` can be set in the `[extra]` section or in your `config.toml`.
 You can add anchor links by adding the following to your `_index.md`:
 ```toml
 insert_anchor_links = "heading"
-```
+```