Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 64ff2b9fa9eca541603a8e2f2bd08bf24de25338
  - Add constraints structure to ToscaProperty
    
    Add constraints structure to ToscaProperty and implements
    the valid_values property.
    
    Change-Id: Id69581582839a8937f0c76c24d6a6bfcc7f0a957
    Issue-ID: SDC-3084
    Signed-off-by: andre.schmid <andre.schmid@est.tech>
    
1 file changed