update disclaimer and ignored list

templates/index.html

@@ -11,10 +11,10 @@
         <h3>See Leaderboards</h3>
         <p>
             Disclaimer: This reads commits from git log and may not match
-            commits from Github insights.
+            commits from Github insights. It only reads from MAIN branch.
         </p>
         <p>    
-          Additionally, any commits made through the Github web interface are ignored.
+          Any commits made through the Github web interface are ignored.
         </p>
         <p>
           Files with matching patterns may be ignored in your commits. E.g. node_module files.