添加jsonpath-ng的链接，供使用参考。

Author: wangliang181230

ui/src/locales/lang/en-US/workflow.ts

@@ -505,7 +505,7 @@ You are a master of problem optimization, adept at accurately inferring user int
       expression: {
         label: 'Expression',
         placeholder: 'Please enter expression',
-        tooltip: 'Please use JSON Path expressions to split variables, e.g.: $.store.book',
+        tooltip: 'Please use JSON Path expressions to split variables, e.g.: $.store.book . For details, see https://pypi.org/project/jsonpath-ng/1.8.0/',
       },
     },
     parameterExtractionNode: {

ui/src/locales/lang/zh-CN/workflow.ts

@@ -496,7 +496,7 @@ export default {
       expression: {
         label: '表达式',
         placeholder: '请输入表达式',
-        tooltip: '请使用JSON Path 表达式拆分变量，例如：$.store.book',
+        tooltip: '请使用 JSON Path 表达式拆分变量，例如：$.store.book 。详情见 https://pypi.org/project/jsonpath-ng/1.8.0/',
       },
     },
     parameterExtractionNode: {

ui/src/locales/lang/zh-Hant/workflow.ts

@@ -490,7 +490,7 @@ export default {
       expression: {
         label: '表達式',
         placeholder: '請輸入表達式',
-        tooltip: '請使用 JSON Path 表達式拆分變量，例如：$.store.book',
+        tooltip: '請使用 JSON Path 表達式拆分變量，例如：$.store.book 。詳情見 https://pypi.org/project/jsonpath-ng/1.8.0/',
       },
     },
     parameterExtractionNode: {