Update stardist.md

Added the Tensorflow Update Site as requirement. This is a necessity since January 2025. See for instance https://forum.image.sc/t/stardist-error-since-update/107729

Author: BioImaging-NKI

_pages/plugins/stardist.md

@@ -32,7 +32,7 @@ Please only file an issue [here](https://github.com/stardist/stardist-imagej) fo
 1.  Start Fiji (or download and install it from [here](https://fiji.sc) first).
 2.  Select `Help > Update...` from the menu bar.
 3.  Click on the button `Manage update sites`.
-4.  Scroll down the list and tick the checkboxes for update sites `CSBDeep` and `StarDist`, then click the `Close` button.  
+4.  Scroll down the list and tick the checkboxes for update sites `CSBDeep`, `StarDist` and `TensorFlow`, then click the `Close` button.  
     (If `StarDist` is missing, click `Update URLs` to refresh the list of update sites.)  
     <img src="/media/plugins/stardist-update-site2.png" width="320"/><img src="/media/plugins/stardist-update-site.png" width="320"/>
 5.  Click on `Apply changes` to install the plugin.