Update expected NativeAOT image sizes

Author: AArnott

.github/workflows/build.yml

@@ -68,11 +68,11 @@ jobs:
         # Allow variance of a small threshold of the expected value.
         # Fail even if it's smaller than anticipated so that the expected window can be shrunk in this file.
         if ($IsLinux) {
-          $ExpectedSize = 8.01
+          $ExpectedSize = 7.03
         } elseif ($IsMacOS) {
-          $ExpectedSize = 7.87
+          $ExpectedSize = 6.43
         } else {
-          $ExpectedSize = 6.79
+          $ExpectedSize = 6.83
         }
         $AllowedVariance = 0.2
         $SizeCheckPassed = [math]::Abs($ActualSize - $ExpectedSize) -le $AllowedVariance