Updated Community section

Author: Linda-Editor

docs/toc.yml

@@ -1626,19 +1626,19 @@
 - name: Community
   href: community/community.md
   items:
-  - name: How to contribute?
+  - name: Contribute
     href: community/contribute.md
   - name: Open source projects
     href: community/open-source-projects.md
   - name: GitHub repositories
     href: community/repositories.md
-  - name: Issues °
+  - name: Submit issues
     href: https://aka.ms/spdev-issues
-  - name: Feature Requests °
+  - name: Submit feature requests
     href: http://aka.ms/spdev-uservoice
-  - name: SharePoint Dev at YouTube °
+  - name: SharePoint development on YouTube
     href: http://aka.ms/spdev-videos
-  - name: OfficeDev Twitter °
+  - name: Office development on Twitter
     href: https://twitter.com/officedev
-  - name: Deveveloper Forum °
-    href: http://aka.ms/spdev-community  
+  - name: SharePoint developer forum
+    href: http://aka.ms/spdev-community