fix(set_cubes_cw_max_version): MR title was telling the wrong version number

cube_doctor/transforms/set_cubes_cw_max_version.py

@@ -131,11 +131,13 @@ class SetCubeCubicWebMaxVersion(Command):
 
         repo.write_file(pkginfo_path, red.dumps())
 
+        maximum_version = LooseVersion(new_conditions[-1][1])
+
         yield {
             "branch_name": self.BRANCH_NAME,
             "commit_message": (
                 self.commit_message
-                % f"{maximum_version.version[0]}.{maximum_version.version[1]}.x"
+                % f"{maximum_version.version[0]}.{maximum_version.version[1] - 1}.x"
             ),
         }