Bump dotnet sdk version to 8.0.403, resolve Windows test flakyness

Author: razzmatazz

.github/workflows/build.yaml

@@ -9,8 +9,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-24.04]
-        dotnet: [8.0.303]
-
+        dotnet: [8.0.403]
     runs-on: ${{ matrix.os }}
 
     steps:

.github/workflows/test.yaml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest, ubuntu-24.04]
-        dotnet: [8.0.303]
+        dotnet: [8.0.403]
       fail-fast: false
 
     runs-on: ${{ matrix.os }}

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "8.0.300",
+    "version": "8.0.400",
     "rollForward": "minor"
   }
 }