DYN-7207: Fix DefineData image of example file (#15407)

doc/distrib/NodeHelpFiles/CoreNodeModels.DefineData.md

@@ -10,7 +10,7 @@ The node has one input:
 -   The "**>**" input - Connect to an upstream node to validate the type of its data.
     Additionally, the node offers three user controls:
 -   The **Auto-detect type** toggle - When toggled on, the node analyzes the incoming data, and if the data is of a supported type, the node sets the Type and List controls' values based on the type of the incoming data. The Type drop-down menu and the List toggle are disabled and will automatically update based on the input node.
-  
+
     When Auto-detect type is toggled off, you can specify a data type by using the Type menu and List toggle. If the incoming data does not match what you've specified, the node will enter a warning state with a null output.
 -   The **Type** drop-down menu - Sets the expected data type. When the control is enabled (**Auto-detect type** toggle is off), set a data type for validation. When the control is disabled (**Auto-detect type** toggle is on), the data type is set automatically based on incoming data. Data is valid if its type matches the shown type exactly or if its type is a child of the shown type (for example, if the Type drop-down is set to "Curve", objects of type "Rectangle", "Line", etc. are valid).
 -   The **List** toggle - When on, the node expects incoming data to be a single flat list containing items of a valid data type (see above). When off, the node expects a single item of a valid data type.
@@ -23,4 +23,4 @@ When set as an input ("Is Input" in the node's context menu), the node can optio
 
 In the example below, the first group of "DefineData" nodes have the **Auto-detect type** toggle off. The node correctly validates the Number input provided while rejecting the String input. The second group contains a node with **Auto-detect type** toggled on. The node automatically adjusts the Type drop-down and the List toggle to match the input, in this case a list of integers.
 
-![Define_Data](./CoreNodeModels.DefineData_img.jpg)
+![Define_Data](./CoreNodeModels.DefineData_img.png)