Fix URL for Q&A with the maintainers session

Change-Id: Iaa5490e4e2c6588fa5f4783c4ac048186287862e

schedule.md

diff --git a/schedule.md b/schedule.md
index 85713cd..17ba54b 100644
--- a/schedule.md
+++ b/schedule.md
@@ -47,7 +47,7 @@
 | Time CEST | Time PDT  | Session
 |-----------|-----------|-------------------------------------------------
 | 10:30     |           | Networking
-| 11:00     |           | [Q&A with the maintainers](schedule/maintainers-qa.md)
+| 11:00     |           | [Q&A with the maintainers](sessions/maintainers-qa.md)
 | 11:45     |           | Break
 | 12:00     |           | [What's new in Gerrit v3.8](sessions/whats-new-gerrit-3.8.md)
 | 12:45     |           | Lunch & Networking