Update SDK

Author: ViktorHofer

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "11.0.100-alpha.1.26064.118",
+    "version": "11.0.100-preview.1.26078.121",
     "rollForward": "latestFeature",
     "paths": [
       ".dotnet",
@@ -9,7 +9,7 @@
     "errorMessage": "The required .NET SDK wasn't found. Please run ./eng/common/dotnet.cmd/sh to install it."
   },
   "tools": {
-    "dotnet": "11.0.100-alpha.1.26064.118"
+    "dotnet": "11.0.100-preview.1.26078.121"
   },
   "msbuild-sdks": {
     "Microsoft.DotNet.Arcade.Sdk": "11.0.0-beta.26070.3",