Update singularity-it4i.md

docs.it4i/software/tools/singularity-it4i.md

@@ -44,8 +44,8 @@ Then you can update your copy of the image by the `image-update` command.
 
 The runscript inside the Apptainer image can be run by the `image-run` command.
 
-!!! note
-    This command automatically mounts the `/scratch` and `/apps` storage and invokes the image as writable, so user changes can be made. (Only module CentOS/7)
+!!! note " CentOS/7 module only"
+    This command automatically mounts the `/scratch` and `/apps` storage and invokes the image as writable, so user changes can be made.
 
 Very similar to `image-run` is the `image-exec` command.
 The only difference is that `image-exec` runs a user-defined command instead of a runscript.