apertis-sample-*: Simplify some comments

Some comments are too detailed and may become inaccurate when we switch to a
different board type.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

apertis-sample-image-development.yaml

@@ -17,7 +17,7 @@ actions:
       suite: {{ $suite }}
       timestamp: {{ $timestamp }}
 
-  # Create the MX6 SabreLite image based on rootfs created during previous action
+  # Package up everything in a image
   - action: recipe
     description: Create image {{ $image }} for {{ $suite }} {{ $type }} {{ $architecture }}
     recipe: apertis-image-mx6qsabrelite.yaml

apertis-sample-image-production.yaml

@@ -47,7 +47,7 @@ actions:
     chroot: false
     command: find ${ROOTDIR} -maxdepth 1 -mindepth 1 -exec rm -rf {} \;
 
-  # Create the U-Boot image based on OSTree rootfs created during previous action
+  # Package up everything in a image
   - action: recipe
     description: Create image {{ $image }} for {{ $suite }} {{ $type }} {{ $architecture }}
     recipe: apertis-ostree-image-uboot.yaml

apertis-sample-image-sdk.yaml

@@ -21,7 +21,7 @@ actions:
       suite: {{ $suite }}
       timestamp: {{ $timestamp }}
 
-  # Create the Base SDK image based on OSTree rootfs created during previous action
+  # Package up everything in a image for VirtualBox
   - action: recipe
     description: Create image {{ $image }} for {{ $suite }} {{ $type }} {{ $architecture }}
     recipe: apertis-image-sdk.yaml