Use an arrow instead of hand to signify a PR

src/FormatUtil.ts

@@ -34,7 +34,7 @@ export class FormatUtil {
             case "Issue":
                 return "📝";
             case "PullRequest":
-                return "✋"; // What should we do about this?
+                return "⤵";
             default: 
                 return "🔔";
         }