See if markdown is supported

lib/actions-util.js

@@ -224,9 +224,10 @@ async function getWorkflowErrors() {
 exports.getWorkflowErrors = getWorkflowErrors;
 function formatWorkflowErrors(errors) {
     const issuesWere = errors.length === 1 ? "issue was" : "issues were";
-    return `${errors.length} ${issuesWere} detected with this workflow: ${errors
-        .map((e) => e.message)
-        .join(", ")}
+    const errorsList = `* ${errors.map((e) => e.message).join("\n* ")}`;
+    return `${errors.length} ${issuesWere} detected with this workflow:
+  
+${errorsList}
 
 Please visit https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning for the latest guidance on configuring Code Scanning.`;
 }