new output syntax

Signed-off-by: Christian Henkel <christian.henkel2@de.bosch.com>

Author: ct2034

.github/workflows/check_examples.yml

@@ -15,7 +15,7 @@ jobs:
               run: |
                   FILES=$(find examples -type f -name "*.ascxml" -o -name "*.scxml" -o -name "*.xml" | jq -R . | jq -s .)
                   echo "Files found: $FILES"
-                  echo "::set-output name=files::$FILES"
+                  echo "files=$FILES" >> $GITHUB_OUTPUT
     validate-xml:
         strategy:
             matrix: