[Update Request]: Dolphin Emulator - Update to Rolling Release (2512)

### What type of update are you requesting?

A new version of an existing package

### Current Package Identifier

DolphinEmulator.Dolphin

### Package Version

2512

### Please describe the changes you would like to see

### Description
The current version in the repository (5.0) is a legacy build from 2016. The Dolphin project has since moved to a "Rolling Release" model, and the 5.0 build lacks critical modern features.

Key reasons for this update request:
- Proper Vulkan API support on modern Windows 10/11 systems
- Compatibility with recent AMD/NVIDIA drivers
- Major performance improvements and bug fixes that are missing in the 5.0 build

### Package details

- **Package Identifier:** DolphinEmulator.Dolphin
- **New Version:** 2512
- **Download Page:** https://dolphin-emu.org/download
- **Specific Release URL:** https://dolphin-emu.org/download/release/2512/

Locate the package manifest for DolphinEmulator.Dolphin and inspect how the current 5.0 release is represented. Compare its metadata with the Dolphin 2512 release page, then update the manifest so it references the requested release and verify it using the repository's normal validation process.

Written by the indexing model from the issue text.