docs: Add a little note to the Policy Library main page

Link to example policy directories in the repo.

Signed-off-by: Anna Kapuscinska <anna@isovalent.com>

Author: Anna Kapuscinska

docs/content/en/docs/policy-library/_index.md

@@ -4,3 +4,7 @@ weight: 5
 description: >
   Library of Tetragon Policies
 ---
+
+The Policy Library provides structured examples of Tetragon policies paired with relevant use cases. You can explore all documented policies, along with additional examples, in the [policy library directory](https://github.com/cilium/tetragon/tree/main/examples/policylibrary) on Github.
+
+For further community-maintained policy examples, refer to the [policy examples directory](https://github.com/cilium/tetragon/tree/main/examples/tracingpolicy) on GitHub. These examples are valid policies provided by the community but they are not curated in terms of suitability for specific use cases or best practices.

docs/content/en/docs/policy-library/observability/_index.md

@@ -2,8 +2,7 @@
 title: "Tetragon Observability Policies"
 weight: 3
 description: >
-  Library of policies that implement Tetragon observability and runtime enforcement.
-  mechanisms.
+  Library of policies that implement Tetragon observability mechanisms.
 ---