Case README: keep measurement list together

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

case/README.md

@@ -60,7 +60,6 @@ check these against yours and change the values at the top of
   position and the distance from its front face to the PCB.
 - `usb_pos`: where the micro-USB port is along the D1's back edge (38 mm from
   the jack side is a guess based on the UNO layout). Also check `jack_pos`.
-
 - `disp_rotated`: the glass is off-centre on the display's PCB, so the bezel
   depends on which way up the display is mounted. `true` (the default) is the
   orientation the display reads correctly in: turned 180° from the