Test other messages with markdown

Author: OptimumCode

Dangerfile.df.kts

@@ -6,11 +6,14 @@ import systems.danger.kotlin.models.github.GitHubIssueLabel
 danger(args) {
   if (git.modifiedFiles.any { it.contains("json-schema-validator/api/") }) {
     markdown(
-      "## PR introduces changes to the public API<br/>\n" +
+      "## PR introduces changes to the public API\n" +
         "Please add **\"ABI breaking\"** label if **any line** in API file was changed or deleted.<br/>" +
         "Please add **\"API breaking\"** label if **any public method** in API file was changed or deleted.",
     )
   }
+  warn("test warning")
+  message("test message")
+  fail("test fail")
   onGitHub {
     val prLabels = issue.labels
     checkPrLabels(prLabels)