fix calendar link

Change-Id: I486f43702a3c067a0bb4b756a6ec95e12d7d84bf
diff --git a/index.md b/index.md
index 4f6c80a..99326e3 100644
--- a/index.md
+++ b/index.md
@@ -130,7 +130,7 @@
 
 [Members](https://www.gerritcodereview.com/members.html) of the Gerrit community are expected to behave within the guidelines of the community's [Code Of Conduct](https://www.gerritcodereview.com/codeofconduct.html) when representing the community.  We would like to [praise](https://www.gerritcodereview.com/kudos.html) some of the more recent accomplishements from the community.
 
-Members of the community will discuss most Gerrit related things on the [repo-discuss](https://groups.google.com/group/repo-discuss) mailing list. Events such as user summits and hackathons are announced there. You can also see the events posted on our [Calendar](https://calendar.google.com/calendar?cid=Z29vZ2xlLmNvbV91YmIxcGxhNmlqNzg1b3FianI2MWg0dmRpc0Bncm91cC5jYWxlbmRhci5nb29nbGUuY29t">community calendar), or if you prefer to follow us on [Twitter@gerritreview](https://twitter.com/gerritreview).  For a more real-time Gerrit discussion, see our [Slack channel](https://gerritcodereview.slack.com/)
+Members of the community will discuss most Gerrit related things on the [repo-discuss](https://groups.google.com/group/repo-discuss) mailing list. Events such as user summits and hackathons are announced there. You can also see the events posted on our [Calendar](https://calendar.google.com/calendar?cid=Z29vZ2xlLmNvbV91YmIxcGxhNmlqNzg1b3FianI2MWg0dmRpc0Bncm91cC5jYWxlbmRhci5nb29nbGUuY29t), or if you prefer to follow us on [Twitter@gerritreview](https://twitter.com/gerritreview).  For a more real-time Gerrit discussion, see our [Slack channel](https://gerritcodereview.slack.com/)
 
 ## Support