commit discord message: add horizontal lines (#2989)

To better delimit adjacent commits

Zero-K.info/Controllers/GithubController.cs

@@ -64,7 +64,7 @@ public async Task<ActionResult> Hook()
                     dynamic commits = payload.commits;
                     foreach (dynamic commit in commits)
                     {
-                        sb.AppendFormat("\n {0} <{1}>", commit.message, commit.url);
+                        sb.AppendFormat("\n~~                    ~~\n{0} <{1}>", commit.message, commit.url);
                         count++;
                     }
                     if (count > 0) text = $"[{payload.repository.name}] {payload.sender.login} has pushed {count} commits: {sb}";