fix: Fix link for Kafka London meetup (#299)

Signed-off-by: Katherine Stanley <katheris@uk.ibm.com>
diff --git a/events.html b/events.html
index 93bd65e..5ec355b 100644
--- a/events.html
+++ b/events.html
@@ -165,7 +165,7 @@
                     <li><a href="https://www.meetup.com/Edinburgh-Kafka/" target="_blank">Edinburgh, UK</a></li>
                     <li><a href="https://www.meetup.com/Glasgow-Kafka" target="_blank">Glasgow, UK</a></li>
                     <li><a href="https://www.meetup.com/Leeds-Kafka/" target="_blank">Leeds, UK</a></li>
-                    <li><a href=http://www.meetup.com/Apache-Kafka-London/" target="_blank">London, UK</a></li>
+                    <li><a href="https://www.meetup.com/Apache-Kafka-London/" target="_blank">London, UK</a></li>
                     <li><a href="https://www.meetup.com/Manchester-Kafka/" target="_blank">Manchester, UK</a></li>
                     <li><a href="https://www.meetup.com/Reading-Kafka/" target="_blank">Reading, UK</a></li>
                     <li><a href="https://www.meetup.com/Swindon-Kafka" target="_blank">Swindon, UK</a></li>