Update PHL-2025 with CFP dates

Author: dgrizzanti

data/events/2025/philadelphia/main.yml

@@ -14,10 +14,9 @@ ga_tracking_id: "" # If you have your own Google Analytics tracking ID, enter it
 startdate: 2025-09-30T00:00:00+02:00
 enddate:  2025-10-01T23:59:59+02:00
 
-# Leave CFP dates blank if you don't know yet, or set all three at once.
-cfp_date_start:  # start accepting talk proposals.
-cfp_date_end:  # close your call for proposals.
-cfp_date_announce:  # inform proposers of status
+cfp_date_start: 2025-04-22T00:00:00-03:00 # start accepting talk proposals.
+cfp_date_end: 2025-06-22T23:59:59-03:00 # close your call for proposals.
+cfp_date_announce: 2025-04-22T23:59:59-03:00 # inform proposers of status
 
 cfp_link: "" #if you have a custom link for submitting proposals, add it here. This will control the Propose menu item as well as the "Propose" button.