docs: Fix openAI pricing link (#816)

* Fix openAI pricing link

* Edit the correct file

docs/docs/06-openai.md

@@ -4,7 +4,7 @@ This service uses OpenAI for automatic tagging. This means that you'll incur som
 
 ## Text Tagging
 
-For text tagging, we use the `gpt-4o-mini` model. This model is [extremely cheap](https://openai.com/pricing). Cost per inference varies depending on the content size per article. Though, roughly, You'll be able to generate tags for almost 3000+ bookmarks for less than $1.
+For text tagging, we use the `gpt-4o-mini` model. This model is [extremely cheap](https://openai.com/api/pricing). Cost per inference varies depending on the content size per article. Though, roughly, You'll be able to generate tags for almost 3000+ bookmarks for less than $1.
 
 ## Image Tagging