Update the default version to 6.0.0-rc2

CMakeLists.txt

@@ -11,7 +11,7 @@ macro (superbuild_setup_variables)
   if (cmb_SOURCE_SELECTION STREQUAL "git")
     # Assuming master; just use the latest version, but let the user set their
     # own version in case it is actually a branch from some other version.
-    set(CMB_VERSION_DEFAULT "6.0.0-develop"
+    set(CMB_VERSION_DEFAULT "6.0.0-rc2"
       CACHE STRING "The default version of CMB to use if it cannot be detected")
     mark_as_advanced(CMB_VERSION_DEFAULT)
     set(cmb_default_version "${CMB_VERSION_DEFAULT}")
@@ -29,7 +29,7 @@ macro (superbuild_setup_variables)
   if (smtk_SOURCE_SELECTION STREQUAL "git" OR smtk_SOURCE_SELECTION STREQUAL "from_cmb")
     # Assuming master; just use the latest version, but let the user set their
     # own version in case it is actually a branch from some other version.
-    set(SMTK_VERSION_DEFAULT "3.0.0-develop"
+    set(SMTK_VERSION_DEFAULT "3.0.0-rc2"
       CACHE STRING "The default version of SMTK to use if it cannot be detected")
     mark_as_advanced(SMTK_VERSION_DEFAULT)
     set(smtk_default_version "${SMTK_VERSION_DEFAULT}")