kcms/screenedges: Fix listing of effects

Effects have KWin/Effect package type.

src/kcms/screenedges/main.cpp

@@ -139,7 +139,7 @@ void KWinScreenEdgesConfig::monitorInit()
     m_form->monitorAddItem(i18n("Toggle alternative window switching"));
 
     KConfigGroup config(m_config, "Plugins");
-    const auto effects = KPackage::PackageLoader::self()->listPackages(QStringLiteral("KWin/Script"), QStringLiteral("kwin/builtin-effects/")) << KPackage::PackageLoader::self()->listPackages(QStringLiteral("KWin/Script"), QStringLiteral("kwin/effects/"));
+    const auto effects = KPackage::PackageLoader::self()->listPackages(QStringLiteral("KWin/Effect"), QStringLiteral("kwin/builtin-effects/")) << KPackage::PackageLoader::self()->listPackages(QStringLiteral("KWin/Effect"), QStringLiteral("kwin/effects/"));
 
     for (const KPluginMetaData &effect : effects) {
         if (!effect.value(QStringLiteral("X-KWin-Border-Activate"), false)) {