remove example from toc

(cherry picked from commit 76a324e)

Author: shuangela

source/usage-examples.txt

@@ -20,7 +20,7 @@ Usage Examples
 .. toctree::
 
    Find Operations </usage-examples/find-operations>
-   Write Operation Examples </usage-examples/write-operations>
+   Write Operations </usage-examples/write-operations>
    Bulk Operations </usage-examples/bulkWrite>
    Monitor Data Changes </usage-examples/changestream>
    Count Documents Method Example </usage-examples/count>