Remove more references to high velocity ammo (#18857)

Content.YAMLLinter/Program.cs

@@ -26,6 +26,7 @@ namespace Content.YAMLLinter
             if (count == 0)
             {
                 Console.WriteLine($"No errors found in {(int) stopwatch.Elapsed.TotalMilliseconds} ms.");
+                PoolManager.Shutdown();
                 return 0;
             }