Update .NET SDK (#5121)

Update .NET SDK to version 9.0.100-preview.4.24221.5.

---
updated-dependencies:
- dependency-name: Microsoft.NET.Sdk
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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global.json

@@ -1,9 +1,9 @@
 {
   "sdk": {
-    "version": "9.0.100-preview.4.24215.2"
+    "version": "9.0.100-preview.4.24221.5"
   },
   "tools": {
-    "dotnet": "9.0.100-preview.4.24215.2",
+    "dotnet": "9.0.100-preview.4.24221.5",
     "runtimes": {
       "dotnet/x64": [
         "8.0.0",