fixed frontent to frontend in features dropdown

Author: simranquirky

docs/features/.pages

@@ -2,6 +2,6 @@ nav:
   - Log Management: logs.md
   - Metric Monitoring: metrics.md
   - Distributed Tracing: distributed-tracing.md
-  - Frontent Observability: frontend.md
+  - Frontend Observability: frontend.md
   - Enterprise Features: enterprise.md
   - What's next: upcoming.md