Update .NET SDK to 6.0.100-rc.2.21430.28 (#35944)

global.json

@@ -1,9 +1,9 @@
 {
   "sdk": {
-    "version": "6.0.100-rc.2.21424.34"
+    "version": "6.0.100-rc.2.21430.28"
   },
   "tools": {
-    "dotnet": "6.0.100-rc.2.21424.34",
+    "dotnet": "6.0.100-rc.2.21430.28",
     "runtimes": {
       "dotnet/x64": [
         "2.1.27",