Merge pull request #887 from Mr-Bart-Simpson/develop

Bugfix: Array indexing at non existent item

Source/Meadow.Foundation.Peripherals/ICs.IOExpanders.Pcx857x/Driver/Drivers/Extras/Pcx8574.cs

@@ -158,7 +158,7 @@ protected byte ReadState8()
         {
             Span<byte> buffer = stackalloc byte[1];
             i2cComms.Read(buffer);
-            return buffer[1];
+            return buffer[0];
         }
 
         /// <summary>