Use note directive.

Author: rossbar

content/tutorial-svd.md

@@ -215,7 +215,11 @@ Now, applying the [linalg.svd](https://numpy.org/devdocs/reference/generated/num
 U, s, Vt = linalg.svd(img_gray)
 ```
 
-**Note** If you are using your own image, this command might take a while to run, depending on the size of your image and your hardware. Don't worry, this is normal! The SVD can be a pretty intensive computation.
+```{note}
+If you are using your own image, this command might take a while to run,
+depending on the size of your image and your hardware.
+Don't worry, this is normal! The SVD can be a pretty intensive computation.
+```
 
 +++