the graph shows contributors, not contributions (#485)

diff --git a/_layouts/community.html b/_layouts/community.html
index 76581f7..95ec9c4 100644
--- a/_layouts/community.html
+++ b/_layouts/community.html
@@ -305,7 +305,7 @@
         <a class="indexable" id="contributions"></a>
         <h3>Contributions</h3>
         <p>
-          The following graphic shows project contributions over time across all active OpenWhisk repositories.
+          The following graphic shows unique project contributors over time across all active OpenWhisk repositories.
         </p>
         <a href="https://www.apiseven.com/en/contributor-graph?chart=contributorOverTime&repo=apache/openwhisk&merge=true"><img
             src="https://contributor-graph-api.apiseven.com/contributors-svg?chart=contributorOverTime&repo=apache/openwhisk&merge=true"