Update sdk to 6.0.100-rc.2.21457.23 (#36260)

Co-authored-by: Hao Kung <[email protected]>

Author: github-actions[bot]

global.json

@@ -1,9 +1,9 @@
 {
   "sdk": {
-    "version": "6.0.100-rc.2.21430.28"
+    "version": "6.0.100-rc.2.21457.23"
   },
   "tools": {
-    "dotnet": "6.0.100-rc.2.21430.28",
+    "dotnet": "6.0.100-rc.2.21457.23",
     "runtimes": {
       "dotnet/x64": [
         "2.1.27",