Use date key instead of status for release date

epistrephein · epistrephein · commit e73d4c1b0e81 · 2018-12-26T08:19:02.000+01:00
diff --git a/_data/branches.yml b/_data/branches.yml
@@ -10,7 +10,7 @@
 
 - name: 2.6
   status: normal maintenance
-  status: 2018-12-25
+  date: 2018-12-25
   eol_date:
 
 - name: 2.5
