What's new in Gerrit 2.8: Add final "Questions?" slide

Change-Id: I190126a8a9f0b794e88e6e718850486ae748132e

presentations/gerrit-new-features-2.8/gerrit-new-features-2.8.txt

diff --git a/presentations/gerrit-new-features-2.8/gerrit-new-features-2.8.txt b/presentations/gerrit-new-features-2.8/gerrit-new-features-2.8.txt
index aa347bc..683d084 100644
--- a/presentations/gerrit-new-features-2.8/gerrit-new-features-2.8.txt
+++ b/presentations/gerrit-new-features-2.8/gerrit-new-features-2.8.txt
@@ -204,6 +204,8 @@
 
 ** Deploy the plugin API artifacts to the public repository
 
+== Questions?
+
 ++++
 <style type="text/css">
 #title-page {