UUF: Code example is for a different delegate

### Type of issue

Other (describe below)

### Description

The code example is wrong. It is about EventHandler. The correct code example is the first example on this page: https://learn.microsoft.com/en-us/dotnet/standard/events/how-to-raise-and-consume-events.

### Page URL

https://learn.microsoft.com/en-us/dotnet/api/system.eventhandler?view=net-8.0

### Content source URL

https://github.com/dotnet/dotnet-api-docs/blob/main/xml/System/EventHandler.xml

### Document Version Independent Id

45d1db6b-180e-bc7c-7cd5-2ca83367b161

### Article author

@dotnet-bot @gewarren