add preview tag

Author: PatrickFarley

articles/ai-foundry/openai/concepts/content-filter-prompt-shields.md

@@ -17,7 +17,7 @@ Prompt shields analyzes LLM inputs and detects adversarial user input attacks.
 
 [!INCLUDE [prompt-shield-attack-info](../../../ai-services/content-safety/includes/prompt-shield-attack-info.md)]
 
-## Spotlighting for prompt shields
+## Spotlighting for prompt shields (preview)
 
 Spotlighting is a feature that enhances protection against indirect attacks by tagging the input documents with special formatting to indicate lower trust to the model. When spotlighting is enabled, the service transforms the document content using base-64 encoding, and the model treats this content as less trustworthy than direct user and system prompts. This helps prevent the model from executing unintended commands or actions that are found in the content of the documents.
 

articles/ai-foundry/openai/whats-new.md

@@ -33,7 +33,7 @@ Sora (2025-05-02) is a video generation model from OpenAI that can create realis
 
 Follow the [Video generation quickstart](/azure/ai-services/openai/video-generation-quickstart) to get started. For more information, see the [Video generation concepts](./concepts/video-generation.md) guide.
 
-### Spotlighting for prompt shields
+### Spotlighting for prompt shields (preview)
 
 Spotlighting is a sub-feature of prompt shields that enhances protection against indirect (embedded document) attacks by tagging input documents with special formatting to indicate lower trust to the model. For more information, see the [Prompt shields filter](./concepts/content-filter-prompt-shields.md) documentation.