Use proper log function

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/scripts/analyze_outcomes.py b/tests/scripts/analyze_outcomes.py
index 7af910f..ca113a4 100755
--- a/tests/scripts/analyze_outcomes.py
+++ b/tests/scripts/analyze_outcomes.py
@@ -66,7 +66,7 @@
 
     shell_command = "tests/scripts/all.sh --outcome-file " + outcome_file + \
                     " " + ref_component + " " + driver_component
-    print("Running: " + shell_command)
+    Results.log("Running: " + shell_command)
     ret_val = subprocess.run(shell_command.split(), check=False).returncode
 
     if ret_val != 0: