Added memory requirement and updated minimum NVIDIA GPU (#692)

Author: hyperbx

README.md

@@ -29,9 +29,11 @@ Unleashed Recompiled is an unofficial PC port of the Xbox 360 version of Sonic U
   - Intel: Sandy Bridge (Intel Core 2nd Generation)
   - AMD: Bulldozer (AMD FX series)
 - GPU with support for Direct3D 12.0 (Shader Model 6) or Vulkan 1.2:
-  - NVIDIA: GeForce GT 630
+  - NVIDIA: GeForce GT 630 (Kepler)
   - AMD: Radeon HD 7750 (2012, not the RX 7000)
   - Intel: HD Graphics 510 (Skylake)
+- Memory:
+  - 8 GB minimum
 - Operating System:
   - Windows 10 (version 1909)
   - A modern Linux distro such as Ubuntu 22.04 LTS