Form Upgrade SIG

As a result of conversations across multiple PTG's and Forums
there is a consensus that a SIG to focus on improving the process
for upgrading OpenStack clouds would be a good idea.

Change-Id: Ic60aaa5b993a35de5103b93375784accee7a4fbe

sigs.yaml

@@ -124,6 +124,26 @@ Self-healing:
   status: active
   url: https://wiki.openstack.org/wiki/Self-healing_SIG
 
+Upgrade:
+  chairs:
+    - name: James Page
+      irc: jamespage
+      email: james.page@canonical.com
+    - name: Lee Yarwood
+      irc: lyarwood
+      email: lyarwood@redhat.com
+    - name: Lujin Luo
+      irc: lujinluo
+      email: luo.lujin@jp.fujitsu.com
+  scope: >
+    The objective of the Upgrade SIG is to improve the overall upgrade
+    process for OpenStack Clouds, covering both offline 'fast-forward'
+    upgrades and online 'rolling' upgrades, by providing a forum for
+    cross-project collaboration between operators and developers to
+    document and codify best practice for upgrading OpenStack.
+  status: active
+  url: https://wiki.openstack.org/wiki/Upgrade_SIG
+
 Meta:
   chairs:
     - name: Melvin Hillsman