fix: bubble integration doc (#1925)

Fixed missing code block closure in Bubble integration documentation

This PR fixes a formatting issue in the Bubble integration documentation
where a JSON code block was not properly closed. The missing closing
code block marker (```) has been added after line 109, ensuring the
proper rendering of the documentation and preventing subsequent content
from being incorrectly formatted as code.

This minor adjustment makes the rest of the doc more readable and
follows the Markdown format.

Author: daveomri

sources/platform/integrations/workflows-and-notifications/bubble.md

@@ -107,6 +107,7 @@ Dynamic values are available across Apify plugin fields. Use Bubble's **Insert d
 {
   "url": "Input URL's value"
 }
+```
 
 :::tip Inserting dynamic data