fix: fix nsis installer action, so that it works on windows-2025, use upstream action

Author: Totto16

.github/workflows/windows_installer.yml

@@ -28,10 +28,9 @@ jobs:
       - name: Setup meson
         run: |
           pip install meson
-        
-      # TODO: use the upstream version, once everything is merged
+
       - name: Install NSIS with EnVar plugin
-        uses: Totto16/install-nsis@c2c3e016bf85cd88bb9f435cc7966422ea2766de
+        uses: repolevedavaj/install-nsis@v1.0.3
         with:
           nsis-version: '3.11'