Add link from AI Agents module develop docs to Sentry conventions. (#14321)

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## DESCRIBE YOUR PR

Add link to the Sentry Conventions page in the AI Agents module page. 

Preview Link:

https://develop-docs-git-antonpirker-developai-agents-module-lin-e07ee5.sentry.dev/sdk/telemetry/traces/modules/ai-agents/

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Author: antonpirker

develop-docs/sdk/telemetry/traces/modules/ai-agents.mdx

@@ -10,6 +10,12 @@ For your AI agents data to show up in the Sentry [AI Agents Insights](https://se
 
 We try to follow the [OpenTelemetry Semantic Conventions](https://opentelemetry.io/docs/specs/semconv/gen-ai/) for Generative AI as close as possible. Being 100% compatible is not yet possible, because OpenTelemetry has "Span Events" which Sentry does not support. The input/output to/from an AI model is stored in span events in OpenTelemetry. Since this is not possible in Sentry, we add this data onto span attributes as a list.
 
+<Alert level="success" title="Hint">
+The [Sentry Conventions](https://getsentry.github.io/sentry-conventions/generated/attributes/) have all the detailed specifications for `"gen_ai.*"` span attributes.
+
+Sentry Conventions is the single source of truth.
+</Alert>
+
 ### Invoke Agent Span
 
 Describes AI agent invocation.