add security policy for Ollama

Signed-off-by: fria <[email protected]>

docs/ai-chat.md

@@ -104,6 +104,7 @@ In addition to supporting a wide range of text models, Ollama also supports [LLa
 [:octicons-home-16: Homepage](https://ollama.com){ .md-button .md-button--primary }
 [:octicons-info-16:](https://github.com/ollama/ollama#readme){ .card-link title="Documentation" }
 [:octicons-code-16:](https://github.com/ollama/ollama){ .card-link title="Source Code" }
+[:octicons-lock-16:](https://github.com/ollama/ollama/blob/a14f76491d694b2f5a0dec6473514b7f93beeea0/SECURITY.md){ .card-link title="Security Policy" }
 
 <details class="downloads" markdown>
 <summary>Downloads</summary>