[www] Fix Ocata series state

Ocata went to End of Life several months ago [1], but it took time to
transition all the projects and it was forgotten to mark Ocata series
status as EOL. This patch corrects now Ocata status in
docs.openstack.org.

[1] http://lists.openstack.org/pipermail/openstack-discuss/2021-June/022989.html

Change-Id: I336dc2f679a2f60a52fc6df3bee73a88991f541b

tools/www-generator.py

@@ -58,7 +58,7 @@ SERIES_INFO = {
     'liberty': SeriesInfo(date='October 2015', status='EOL'),
     'mitaka': SeriesInfo(date='April 2016', status='EOL'),
     'newton': SeriesInfo(date='October 2016', status='EOL'),
-    'ocata': SeriesInfo(date='February 2017', status='extended-maintenance'),
+    'ocata': SeriesInfo(date='February 2017', status='EOL'),
     'pike': SeriesInfo(date='August 2017', status='extended-maintenance'),
     'queens': SeriesInfo(date='March 2018', status='extended-maintenance'),
     'rocky': SeriesInfo(date='August 2018', status='extended-maintenance'),