Make PTG virtual and move it to June 1-5

Fix Victoria release schedule to match the new plan
for PTG.

Change-Id: I3395cac82fb15a16b24474f690bd729612f62713

doc/source/victoria/schedule.rst

@@ -32,13 +32,13 @@ Pre-cycle planning and investigation into `the community-wide goals
 for Victoria
 <https://governance.openstack.org/tc/goals/selected/victoria/index.html>`__.
 
-.. _v-opendev:
+.. _v-ptg:
 
-OpenDev + PTG
--------------
+Virtual PTG
+-----------
 
-The OpenDev+PTG happens during this week in Vancouver, British Columbia.
-The Project Teams Gathering provides and opportunity for teams to collaborate
+A virtual PTG will be held during this week. The Project Teams Gathering
+provides and opportunity for teams to collaborate
 and plan, and discuss requirements for future releases.
 
 .. _v-1:

doc/source/victoria/schedule.yaml

@@ -16,11 +16,11 @@ cycle:
 - end: '2020-06-05'
   name: R-19
   start: '2020-06-01'
+  x-project:
+    - v-ptg
 - end: '2020-06-12'
   name: R-18
   start: '2020-06-08'
-  x-project:
-    - v-opendev
 - end: '2020-06-19'
   name: R-17
   start: '2020-06-15'