fix: broken link (#2161)

Author: marcklingen

pages/docs/observability/features/token-and-cost-tracking.mdx

@@ -11,7 +11,7 @@ sidebarTitle: Token & Cost Tracking
   UI](https://static.langfuse.com/250108_model_cost_breakdown.gif)
 </Frame>
 
-Langfuse tracks the usage and costs of your LLM generations and provides breakdowns by usage types. Use and cost can be tracked on observations of type `generation` and `embedding`, see [here](docs/observability/features/observation-types).
+Langfuse tracks the usage and costs of your LLM generations and provides breakdowns by usage types. Usage and cost can be tracked on observations of [type](/docs/observability/features/observation-types) `generation` and `embedding`.
 
 - **Usage details**: number of units consumed per usage type
 - **Cost details**: USD cost per usage type