test(desktop): pin supported platform in startup tests

apps/desktop/tests/main-startup.spec.ts

@@ -281,7 +281,7 @@ beforeEach(() => {
   vi.spyOn(console, 'info').mockImplementation(() => {})
   vi.stubEnv('DSH_DESKTOP_PNPM_ENTRY', 'test-pnpm')
   vi.stubEnv('DSH_DESKTOP_DSH_DIR', 'test-runtime')
-  vi.stubGlobal('process', { ...process, resourcesPath: 'desktop-test-resources' })
+  vi.stubGlobal('process', { ...process, platform: 'win32', resourcesPath: 'desktop-test-resources' })
   vi.stubEnv('DSH_DESKTOP_HOST_INSPECT_PORT', undefined)
   vi.stubEnv('DSH_DESKTOP_MANDATORY_UPDATE_CONFIG', undefined)
   vi.stubEnv('DSH_DESKTOP_UPDATE_JOURNAL_DIR', undefined)