fixed architecture page menuu + seo title (#275)

Co-authored-by: Manas Sharma <manassharma@Manass-MacBook-Pro.local>

Author: Manazsharma

docs/.pages

@@ -1,6 +1,6 @@
 nav:
 - Overview: overview
-- Architechture: architecture.md
+- Architecture: architecture.md
 - Getting started: getting-started.md
 - Features: features
 - Enterprise Edition Installation Guide: openobserve-enterprise-edition-installation-guide.md

docs/architecture.md

@@ -1,9 +1,9 @@
 ---
-title: Introduction to Python
+title:  OpenObserve Architecture
 description: >-
   Deploy OpenObserve in single or HA mode. Learn about architecture, components,
   storage, data flow, and performance optimization features.
-keywords: 'python, beginner, tutorial'
+keywords: 'openobserve, architecture, tutorial'
 ---
 
 > Applicable to open source & enterprise version