README: update syntax of Apertis image names

Reviewed-by: Philip Withnall <philip.withnall@collabora.co.uk>
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D2116

README

@@ -11,27 +11,20 @@ To submit e.g. a minimal boot test to minnowboard (daily 16.03) targets use:
 
     lqa submit -g templates/profiles.yaml \
       -p apertis-16.03-daily-minnowboard-max-target \
-      -t image_date:150624-001801 \
-      -t image_version:14.00.25 \
+      -t image_date:20160229.0 \
       templates/minimal-tpl.json
 
 The image_date variable specifies the image data of the image to use, see
 https://images.apertis.org/daily/16.03/ for the list of
 available images.
 
-The image_version variable is also part of the image's filename.
-The first part is incremented every quarter, the second part is 00
-for daily builds or 01 for quarterly releases and the third is the
-ISO week number (date +%W).
-
 Note that lqa can replace any variable (either json items or {{variable}}) this
 can for example be used to change the git-repo value to non-standard repository
 to test tests before merging them for example:
 
     lqa submit -g templates/profiles.yaml \
       -p apertis-16.03-daily-minnowboard-max-target \
-      -t image_date:150624-001801 \
-      -t image_version:14.00.25 \
+      -t image_date:20160229.0 \
       -t git-repo:https://...@git.apertis.org/git/users/me/apertis-tests.git \
       -t revision:test \
       templates/minimal-tpl.json