Ensure the new "diffoscope-minimal" package has a different short description...

Ensure the new "diffoscope-minimal" package has a different short description from the main "diffoscope" one.

debian/control

@@ -106,7 +106,7 @@ Recommends:
  ${python3:Recommends},
 Breaks: diffoscope (<< 162~)
 Replaces: diffoscope (<< 162~)
-Description: in-depth visual diff tool for files, archives and directories
+Description: in-depth visual diff tool for files, archives and directories (minimal package)
  diffoscope is a visual diff tool that attempts try to get to the bottom of
  what makes files or directories actually different.
  .