fix: advanced techniques link target (#987)

Author: gildesmarais

src/content/docs/common-use-cases.mdx

@@ -102,7 +102,7 @@ Follow multiple open source projects and their updates.
 1. **Identify the websites** you want to follow
 2. **Check our [Feed Directory](/feed-directory/)** to see if feeds already exist
 3. **Try the [Web App](/web-application/getting-started)** to create feeds easily
-4. **Learn advanced techniques** with our [Config Guide](/html2rss-configs/)
+4. **Learn advanced techniques** with our [Config Guide](/creating-custom-feeds/)
 
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