[audio_core] remove dangling Core::System& references

Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/audio_core/renderer/audio_renderer.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -84,7 +87,7 @@ public:
 
 private:
     /// System core
-    Core::System& core;
+    Core::System& system;
     /// Manager this renderer is registered with
     Manager& manager;
     /// Is the audio renderer initialized?
@@ -92,7 +95,7 @@ private:
     /// Is the system registered with the manager?
     bool system_registered{};
     /// Audio render system, main driver of audio rendering
-    System system;
+    System audio_system;
 };
 
 } // namespace Renderer