tools: adopt the --check-for-duplicates NCU flag

Author: aduh95

tools/actions/start-ci.sh

@@ -10,7 +10,7 @@ for pr in "$@"; do
 
   ci_started=yes
   rm -f output;
-  ncu-ci run "$pr" >output 2>&1 || ci_started=no
+  ncu-ci run --check-for-duplicates "$pr" >output 2>&1 || ci_started=no
   cat output
 
   if [ "$ci_started" = "no" ]; then