ci: update build version to 01.07.07.88

Change-Id: I3540eab6552b682f678bdc7966741348f58aa2bd

Author: gerrit

version.inc

@@ -12,4 +12,4 @@ set(BBL_INTERNAL_TESTING "1")
 endif()
 
 # The build_version should start from 50 in master branch
-set(SLIC3R_VERSION "01.07.07.87")
+set(SLIC3R_VERSION "01.07.07.88")