[AI Gateway] Update changelog entry (#19783)

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Co-authored-by: Pedro Sousa <[email protected]>

Author: kathayl

src/content/changelogs/ai-gateway.yaml

@@ -8,7 +8,7 @@ entries:
   - publish_date: "2025-02-05"
     title: New AI Gateway providers
     description: |-
-      * **Configuration**: Added [ElevenLabs](https://elevenlabs.io/),[Cartesia](https://docs.cartesia.ai/) and [Cerebras](https://inference-docs.cerebras.ai/) as new providers.
+      * **Configuration**: Added [ElevenLabs](https://elevenlabs.io/), [Cartesia](https://docs.cartesia.ai/), and [Cerebras](https://inference-docs.cerebras.ai/) as new providers.
 
   - publish_date: "2025-01-02"
     title: DeepSeek