fix: resolve YAML parse error in codeant workflow

.gitea/workflows/codeant.yml

@@ -122,9 +122,7 @@ jobs:
 
               # Pace requests to avoid backend throttling on CI runners.
               sleep 12
-            done <<EOF
-${CHANGED_FILES}
-EOF
+            done <<< "${CHANGED_FILES}"
 
             if [ "$FAILED" -eq 1 ]; then
               echo "Completed with API instability; some files may be partially reviewed." | tee -a review.txt
@@ -154,9 +152,7 @@ EOF
                 fi
 
                 sleep 12
-              done <<EOF
-${CHANGED_FILES}
-EOF
+              done <<< "${CHANGED_FILES}"
 
               if [ "$FAILED" -eq 1 ]; then
                 echo "Completed with API instability; some merged files may be partially reviewed." | tee -a review.txt