Update content related to editing subscriptions (#642)

Co-authored-by: Riskey <riskey47@dify.ai>

Author: RiskeyL

en/use-dify/nodes/trigger/plugin-trigger.mdx

@@ -36,10 +36,6 @@ For example, suppose you have installed a GitHub trigger plugin. It provides a l
 
 ## Create a New Subscription
 
-<Note>
-    A subscription cannot be modified once created. To make changes, delete the existing one and create a new subscription. 
-</Note>
-
 <Info>
     A trigger plugin supports creating up to 10 subscriptions per workspace.
 </Info>
@@ -63,7 +59,7 @@ Dify supports the following two methods for creating subscriptions (webhooks), b
 <Tip>
     It's recommended to select all available events when creating a subscription.
 
-    A plugin trigger works only when its corresponding event is included in the linked subscription. Selecting all available events ensures that any plugin trigger you add to the workflow later can use the same subscription, without creating another one.
+    A plugin trigger works only when its corresponding event is included in the linked subscription. Selecting all available events ensures that any plugin trigger you add to the workflow later can use the same subscription—no need to update or create new ones.
 </Tip>
 
 <Tabs>
@@ -92,7 +88,7 @@ Dify supports the following two methods for creating subscriptions (webhooks), b
                 3. Specify the subscription name, select the events you want to subscribe to, and configure any other required settings.
 
                     <Tip>
-                        We recommend selecting all available events.
+                        We recommend selecting all available events, but you can always change your selection later from the plugin's details panel under **Plugins**.
                     </Tip>
 
                 4. Click **Create**.
@@ -113,7 +109,7 @@ Dify supports the following two methods for creating subscriptions (webhooks), b
 
             4. Specify the subscription name, select the events you want to subscribe to, and configure any other required settings.
                 <Tip>
-                    We recommend selecting all available events.
+                    We recommend selecting all available events, but you can always change your selection later from the plugin's details panel under **Plugins**.
                 </Tip>
 
             5. Click **Create**.
@@ -138,7 +134,7 @@ Dify supports the following two methods for creating subscriptions (webhooks), b
     3. Specify the subscription name, select the events you want to subscribe to, and configure any other required settings.
 
         <Tip>
-            We recommend selecting all available events.
+            We recommend selecting all available events, but you can always change your selection later from the plugin's details panel under **Plugins**.
         </Tip>
 
     4. Click **Create**.