Add missing label field

Author: tom-tan

conformance_tests.yaml

@@ -3397,6 +3397,7 @@
   doc: Test paramer reference that refers to length of non-array input
   should_fail: true
   tags: [ required, command_line_tool ]
+  label: length_for_non_array
 
 - job: tests/length_non_array_input.yml
   tool: tests/params_input_length_non_array.cwl
@@ -3406,6 +3407,7 @@
     output1: 1
     output2: 2
     output3: 3
+  label: user_defined_length_in_parameter_reference
 
 - tool: tests/cat4-from-dir.cwl
   job: tests/cat-from-dir-with-literal-file-in-subdir.yaml