Missed updating the GIMP version in pre-requistes

Author: arisha07

Docs/user_guide_for_windows_users.md

@@ -21,7 +21,7 @@
   - python 3.9-3.12
     - Note: This document will use python 3.9.13 as an example.
   - VC runtime
-  - [GIMP 3.0 RC2](https://download.gimp.org/gimp/v3.0/windows/gimp-3.0.0-RC2-setup.exe)
+  - [GIMP 3.0.2](https://download.gimp.org/gimp/v3.0/windows/gimp-3.0.2-setup-1.exe)
   - [GIMP AI plugins with OpenVINO™ Backend](https://github.com/intel/openvino-ai-plugins-gimp) from Github.