RELEASE-PROCEDURE: refreshed 'coming dates'

docs/RELEASE-PROCEDURE

@@ -84,12 +84,12 @@ Coming dates
 Based on the description above, here are some planned release dates (at the
 time of this writing):
 
-- February 25, 2015 (version 7.41.0)
-- April 22, 2015
-- June 17, 2015
+- June 17, 2015 (version 7.43.0)
 - August 12, 2015
 - October 7, 2015
 - December 2, 2015
 - January 27, 2016
 - March 23, 2016
 - May 18, 2016
+- July 13, 2016
+- September 7, 2016