Close first time speakers workshop info. (#1295)

Workshop has happened. The website should reflect that.

---------

Co-authored-by: Ege Akman <[email protected]>

Author: cybit

src/content/pages/faq.mdx

@@ -23,10 +23,11 @@ subtitle: Frequently Asked Questions about EuroPython
   <li>**February/March 2025** Programme selection process</li>
   <li>**March 2025** Visa Information Page opens</li>
   <li>**01 April 2025** Session preview</li>
+  <li>**20 April 2025** Schedule published</li>
+  <li>**04 June 2025** [First time speakers workshop](/mentorship#online-event-first-time-speakers-workshop)</li>
 </ul>
 
 <ul className="milestone-todo">
-  <li>**20 April 2025** Schedule published</li>
   <li>**9 May 2025** Financial Aid Programme closes</li>
   <li>**14 – 20 July 2025:** EuroPython 2025!🎊 </li>
   <li>**September 2025** EuroPython 2025 Videos published</li>

src/content/pages/programme/mentorship.mdx

@@ -60,7 +60,7 @@ After the CfP, we will host an online panel session with 2–3 experienced commu
 
 **Time**: 6 PM CEST (60-90 mins, depending on the amount of questions)
 
-<Button url="https://forms.gle/T8rc73sbyu3KbLNKA"> Sign Up Now </Button>
+    <Button disabled>Signup closed</Button>
 
 You can watch the recording of the previous year's workshop here: