Fixed typo. Removed operation guide.

Change-Id: Id95fe9573967ae2edb8e04de42b8eb8be629e77c
diff --git a/index.rst b/index.rst
index 71fd437..bc04868 100644
--- a/index.rst
+++ b/index.rst
@@ -5,13 +5,12 @@
 
 .. toctree::
    :maxdepth: 1
-   :caption: Table of Content
+   :caption: Table of Contents
 
    intro
    architecture
    installation
    configuration
-   operation
    troubleshooting
    testing
    community