Fix version string in d/changelog

Signed-off-by: Ritesh Raj Sarraf <ritesh.sarraf@collabora.com>

debian/changelog

-psdk (0.2019~dev0.1+nmu1) apertis; urgency=medium
+psdk (0.2019~dev0.2) apertis; urgency=medium
 
   * Detects disks automatically instead of relying on user to find the correct
     device node