Fix egress example and RBAC typo (#374)

Found a typo in rbac and issue with example while preparing walk-through
docs.

<!-- codesmith:footer -->
---
<a
href="https://app.blacksmith.sh/netbirdio/codesmith/kubernetes-operator/pr/374"><picture><source
media="(prefers-color-scheme: dark)"
srcset="https://pr-comments-assets.blacksmith.sh/codesmith/view-with-codesmith-dark-v2.svg"><source
media="(prefers-color-scheme: light)"
srcset="https://pr-comments-assets.blacksmith.sh/codesmith/view-with-codesmith-light-v2.svg"><img
alt="View with Codesmith"
src="https://pr-comments-assets.blacksmith.sh/codesmith/view-with-codesmith-dark-v2.svg"></picture></a>
<a
href="https://backend.blacksmith.sh/track/enable-autofix?expires=1786871474&installation_id=146802194&pr_number=374&repository=netbirdio%2Fkubernetes-operator&return_to=https%3A%2F%2Fgithub.com%2Fnetbirdio%2Fkubernetes-operator%2Fpull%2F374&signature=050e666d4eacb869624c2045bdedd563bc789a733a0882abb61ae5c880528c3f"><picture><source
media="(prefers-color-scheme: dark)"
srcset="https://pr-comments-assets.blacksmith.sh/codesmith/autofix-with-codesmith-dark.svg"><source
media="(prefers-color-scheme: light)"
srcset="https://pr-comments-assets.blacksmith.sh/codesmith/autofix-with-codesmith-light.svg"><img
alt="Autofix with Codesmith"
src="https://pr-comments-assets.blacksmith.sh/codesmith/autofix-with-codesmith-dark.svg"></picture></a>
<sup>Need help on this PR? Tag <code>/codesmith</code> with what you
need. Autofix is disabled.</sup>

<!-- codesmith:autofix:disabled -->
<!-- /codesmith:footer -->

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Bug Fixes**
  * Corrected permissions for accessing NetworkEgress status resources.
* **Examples**
* Updated the NetworkEgress example to target a service by fully
qualified domain name instead of a static IP address.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

examples/network/networkegress.yaml

@@ -8,8 +8,8 @@ spec:
     name: prod
     namespace: netbird
   target:
-    ip:
-      address: 10.96.92.40
+    fqdn:
+      hostname: nginx.default.prod.company.internal
   ports:
     - name: http
       port: 80