fix(connectivity): rename test button to latency test

ShadowsocksX-NG2/App/Resources/Connectivity.xcstrings

@@ -103,19 +103,19 @@
         }
       }
     },
-    "测试连通性": {
+    "延迟测试": {
       "extractionState": "manual",
       "localizations": {
         "en": {
           "stringUnit": {
             "state": "translated",
-            "value": "Test Connectivity"
+            "value": "Latency Test"
           }
         },
         "zh-Hans": {
           "stringUnit": {
             "state": "translated",
-            "value": "测试连通性"
+            "value": "延迟测试"
           }
         }
       }

ShadowsocksX-NG2/App/UI/Home/HomeTargetCard.swift

@@ -172,7 +172,7 @@ struct HomeTargetCard: View {
         if let module = workflow.connectivity, let selected {
           ConnectivityTestButton(module: module, node: selected)
         } else {
-          Button(ConnectivityCopy.text("测试连通性")) {}.disabled(true)
+          Button(ConnectivityCopy.text("延迟测试")) {}.disabled(true)
         }
         Button(
           activation.isPending

ShadowsocksX-NG2/App/UI/Servers/ConnectivityViews.swift

@@ -89,7 +89,7 @@ struct ConnectivityTestButton: View {
   @ObservedObject var module: ServerConnectivity
   let node: CatalogTreeNode
   var body: some View {
-    Button(ConnectivityCopy.text("测试连通性")) { module.test(node.connectivityServerIDs) }
+    Button(ConnectivityCopy.text("延迟测试")) { module.test(node.connectivityServerIDs) }
       .disabled(!node.containsServerConfiguration || (!node.isGroup && module.isCooling(node.id)))
   }
 }