docs: Clean up the note on nVidia on Windows

Turn the URL to the nVidia forums into an actual link, and put the whole
paragraph into an aside.

docs/reference/gtk/running.md

@@ -415,20 +415,25 @@ using and the GDK backend supports them:
 `vulkan`
 : Selects the Vulkan renderer
 
-Note that on Windows, if one is running Nahimic 3 on a system with
-nVidia graphics, one needs to stop the "Nahimic service" or insert
-the GTK application into the Nahimic blacklist, as noted in
-https://www.nvidia.com/en-us/geforce/forums/game-ready-drivers/13/297952/nahimic-and-nvidia-drivers-conflict/2334568/, or use the cairo renderer (at the cost of being unable to use
-OpenGL features), or use GDK_DEBUG=gl-gles if you know that GLES
-support is enabled for the build.
+
+::: note
+    If you are running the Nahimic 3 service on a Windows system with
+    nVidia graphics, you need to perform one of the following:
+
+     - stop the "Nahimic service"
+     - insert the GTK application into the Nahimic blocklist, as noted in the
+       [nVidia forums](https://www.nvidia.com/en-us/geforce/forums/game-ready-drivers/13/297952/nahimic-and-nvidia-drivers-conflict/2334568/)
+     - use the cairo renderer (at the cost of being unable to use OpenGL features)
+     - use `GDK_DEBUG=gl-gles`, if you know that GLES support is enabled for the build.
 
     This is a known issue, as the above link indicates, and affects quite
-a number of applications--sadly, since this issue lies within the
+    a number of applications—sadly, since this issue lies within the
     nVidia graphics driver and/or the Nahimic 3 code, we are not able
     to rememdy this on the GTK side; the best bet before trying the above
     workarounds is to try to update your graphics drivers and Nahimic
     installation.
 
+
 ### `GSK_GPU_SKIP`
 
 This variable can be set to a list of values, which cause GSK to