Ported auto-exposure initialization fix from FSR 3.1 over to FSR 2.2. Fixes black screen flashes on history reset in OpenGL on Nvidia GPUs.

Runtime/FSR2/Fsr2Context.cs

@@ -212,7 +212,7 @@ namespace FidelityFX.FSR2
                 
                 // Auto exposure always used to track luma changes in locking logic
                 commandBuffer.SetRenderTarget(_resources.AutoExposure);
-                commandBuffer.ClearRenderTarget(false, true, new Color(0f, 1e8f, 0f, 0f));
+                commandBuffer.ClearRenderTarget(false, true, new Color(0f, 1f, 0f, 0f));
 
                 // Reset atomic counter to 0
                 commandBuffer.SetRenderTarget(_resources.SpdAtomicCounter);