test: update icon path assertion to match new naming convention

- Updated test_ir_module_module.py to use new openspp-icons-menu-discuss.png
- Aligns with standardized openspp-icons-menu-* naming pattern
- Prevents test failure after icon renaming refactor

Author: emjay0921

spp_base_common/tests/test_ir_module_module.py

@@ -14,4 +14,4 @@ def test_01_update_menu_icons(self):
         # Verify that the icon was updated
         self.survey_module.next()
         menu = self.env.ref("mail.menu_root_discuss")
-        self.assertEqual(menu.web_icon, "spp_base_common,static/description/icon-Discuss-White-line.png")
+        self.assertEqual(menu.web_icon, "spp_base_common,static/description/openspp-icons-menu-discuss.png")