doc: add security policy link (canonical#6)

zhijie-yang · web-flow · commit 3cfe92f37076 · 2025-01-21T14:19:37.000+06:00
diff --git a/docs/index.md b/docs/index.md
@@ -61,6 +61,7 @@ The Chisel project is sponsored by {{Canonical}}.
 
 - [Code of conduct](https://ubuntu.com/community/ethos/code-of-conduct)
 - [Contribute](https://github.com/canonical/chisel)
+- [Security policy](https://github.com/canonical/chisel/blob/main/SECURITY.md)
 
 
 ```{toctree}
