Update tool name to Microsoft Foundry in TOC

Changed the reference from 'Azure AI Foundry' to 'Microsoft Foundry' in the Sentinel documentation table of contents for consistency with updated naming.

Author: poliveria

articles/sentinel/TOC.yml

@@ -606,7 +606,7 @@
             href: datalake/sentinel-mcp-use-tool-security-copilot.md
           - name: Use Sentinel MCP tools in Copilot Studio
             href: datalake/sentinel-mcp-use-tool-copilot-studio.md
-          - name: Use Sentinel MCP tools in Azure AI Foundry
+          - name: Use Sentinel MCP tools in Microsoft Foundry
             href: datalake/sentinel-mcp-use-tool-azure-ai-foundry.md
           - name: Use Sentinel MCP tools in Visual Studio Code
             href: datalake/sentinel-mcp-use-tool-visual-studio-code.md