Update SDK version in integration test

Author: tamasvajk

csharp/ql/integration-tests/all-platforms/blazor_build_mode_none/BlazorTest/global.json

@@ -1,5 +1,5 @@
 {
     "sdk": {
-        "version": "9.0.100"
+        "version": "9.0.300"
     }
 }