sig-security: add announcement for memorizer
@@ -3,7 +3,7 @@ Time: **9am PDT** (12pm EDT, 5pm BST) [see the time in your timezone](https://ww
Meeting location: https://docker.zoom.us/j/779801882
-Announcement: Coming soon
+Announcement: [Moby project forum post](https://forums.mobyproject.org/t/2017-07-05-linuxkit-security-sig-meeting/96)
Video recording: Coming soon
