[AMS-2025] v4 of the prospectus

We're on v4 of the prospectus due to deadlines passed and re-prioritizing. Thanks!

Author: FloorD

content/events/2025-amsterdam/sponsor.md

@@ -4,7 +4,7 @@ Type = "event"
 Description = "Sponsor DevOpsDays Amsterdam 2025"
 +++
 
-We greatly value sponsors for this open event.  If you are interested in sponsoring, please <a href="https://assets.devopsdays.org/events/2025/amsterdam/DevOpsDays-Amsterdam-2025-Prospectus-v3.pdf">take a look at our prospectus</a>, then drop us an email at [{{< email_organizers >}}].
+We greatly value sponsors for this open event.  If you are interested in sponsoring, please <a href="https://assets.devopsdays.org/events/2025/amsterdam/DevOpsDays-Amsterdam-2025-Prospectus-v4.pdf">take a look at our prospectus</a>, then drop us an email at [{{< email_organizers >}}].
 
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