fix(timeline): update proposal dates to reflect the new schedule

Author: rodneyosodo

src/app/(articles)/proposal.mdx

@@ -8,11 +8,11 @@ We are providing useful and important information below that will help you submi
 
 ## Timeline
 
-1. February 22, 2024 - Call For Proposals Opens
-2. March 30, 2024, 11:59 PM EAT — Call For Proposals Closes
-3. April 5-6, 2025 — Notifications are sent to speakers
-4. April 14, 2025 — The schedule is posted here on the PyCon KE website
-5. May 8-10, 2025 — PyCon KE 2025 in Nairobi, Kenya
+1. April 5, 2025 - Call For Proposals Opens
+2. June 22, 2025, 11:59 PM EAT — Call For Proposals Closes
+3. July 6, 2025 — Notifications are sent to speakers
+4. July 27, 2025 — The schedule is posted here on the PyCon KE website
+5. August 28-30, 2025 — PyCon KE 2025 in Nairobi, Kenya
 
 Part of PyCon KE purpose is to generate materials to help with Python education and advocacy all over the world, so we intend to record all PyCon KE Keynotes, Talks and Lightning Talks and release the recordings on our YouTube channel.