Fix Admin Antag ctrl headrev icon to use RSI instead of texture (#24474)

Fix the warning about direct texture for headrev

Content.Server/Administration/Systems/AdminVerbSystem.Antags.cs

@@ -110,7 +110,7 @@ public sealed partial class AdminVerbSystem
         {
             Text = Loc.GetString("admin-verb-text-make-head-rev"),
             Category = VerbCategory.Antag,
-            Icon = new SpriteSpecifier.Texture(new("/Textures/Interface/Misc/job_icons.rsi/HeadRevolutionary.png")),
+            Icon = new SpriteSpecifier.Rsi(new("/Textures/Interface/Misc/job_icons.rsi"), "HeadRevolutionary"),
             Act = () =>
             {
                 if (!_minds.TryGetMind(args.Target, out var mindId, out var mind))