Ability to support variable in the URL for HTTP Node. (#5284)

Co-authored-by: Bharath <bharathmuthyala@gmail.com>

packages/components/nodes/agentflow/HTTP/HTTP.ts

@@ -67,7 +67,8 @@ class HTTP_Agentflow implements INode {
             {
                 label: 'URL',
                 name: 'url',
-                type: 'string'
+                type: 'string',
+                acceptVariable: true
             },
             {
                 label: 'Headers',