fix yaml

Author: jencarlucci

.github/workflows/linter-failure-notifier.yml

@@ -43,15 +43,13 @@ jobs:
             target_line="• Trigger: ${TRIGGER_EVENT}"
           fi
 
-          message=$(cat <<EOF
-            :warning: Linter workflow failed in ${REPO}.
-            • Workflow: ${RUN_NAME}
-            ${target_line}
-            • Branch: ${BRANCH}
-            • Commit: ${short_sha}
-            • Run: ${RUN_URL}
-          EOF
-        )
+          message=$(printf '%s\n' \
+            ":warning: Linter workflow failed in ${REPO}." \
+            "• Workflow: ${RUN_NAME}" \
+            "${target_line}" \
+            "• Branch: ${BRANCH}" \
+            "• Commit: ${short_sha}" \
+            "• Run: ${RUN_URL}")
 
           curl --fail --silent --show-error \
             -X POST \