Restore original camera target texture if it hasn't been reset after FSR2 is disabled

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/PostProcessLayer.cs

@@ -635,6 +635,12 @@ namespace UnityEngine.Rendering.PostProcessing
             {
                 // Ensure all of FSR2's resources are released when it's not in use
                 superResolution.Release();
+                
+                if (m_originalTargetTexture != null)
+                {
+                    m_Camera.targetTexture = m_originalTargetTexture;
+                    m_originalTargetTexture = null;
+                }
             }
 
             context.command = m_LegacyCmdBufferOpaque;