refactor: Optimize data source timeout text

Author: XiaJunjie2020

frontend/src/i18n/en.json

@@ -387,7 +387,7 @@
         "success": "Connect success",
         "failed": "Connect failed"
       },
-      "timeout": "Timeout(second)",
+      "timeout": "Connection Timeout(second)",
       "address": "Address",
       "low_version": "Compatible with lower versions"
     },

frontend/src/i18n/ko-KR.json

@@ -387,7 +387,7 @@
         "success": "연결 성공",
         "failed": "연결 실패"
       },
-      "timeout": "쿼리 시간 초과(초)",
+      "timeout": "연결 시간 초과(초)",
       "address": "주소",
       "low_version": "낮은 버전 호환"
     },

frontend/src/i18n/zh-CN.json

@@ -387,7 +387,7 @@
         "success": "连接成功",
         "failed": "连接失败"
       },
-      "timeout": "查询超时(秒)",
+      "timeout": "连接超时(秒)",
       "address": "地址",
       "low_version": "兼容低版本"
     },