[Backend] Update dependency dotnet-sdk to v10.0.103

Author: renovate[bot]

backend/global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "10.0.100",
+    "version": "10.0.103",
     "rollForward": "latestMajor",
     "allowPrerelease": true
   }