updated links in mkdocs.yml (#240)

mkdocs.yml

@@ -202,15 +202,15 @@ nav:
   - Nebula Graph Studio:
     - About Nebula Graph Studio:
       - What is Studio: nebula-studio/about-studio/st-ug-what-is-graph-studio.md
-      - Limitations for Studio: nebula-studio/about-studio/st-ug-limitations.md
+      - Limitations: nebula-studio/about-studio/st-ug-limitations.md
       - Check updates: nebula-studio/about-studio/st-ug-check-updates.md
 
     - Deploy and connect:
       - Deploy Studio: nebula-studio/install-configure/st-ug-deploy.md
       - Connect to Nebula Graph: nebula-studio/install-configure/st-ug-connect.md
 
     - Quick start:
-      - Design a schema: nebula-studio/quick-start/st-ug-create-schema.md
+      - Design a schema: nebula-studio/quick-start/st-ug-plan-schema.md
       - Prepare CSV files: nebula-studio/quick-start/st-ug-prepare-csv.md
       - Create a schema: nebula-studio/quick-start/st-ug-create-schema.md
       - Import data: nebula-studio/quick-start/st-ug-import-data.md