Update Dockerfile and global.json updates to v9.0.303

Author: renovate[bot]

.devcontainer/Dockerfile

@@ -1,5 +1,5 @@
 # Refer to https://hub.docker.com/_/microsoft-dotnet-sdk for available versions
-FROM mcr.microsoft.com/dotnet/sdk:9.0.301-noble@sha256:4fd7d3e5aeb6cfb75e923a54cdb0b6e858b27ad3b517837917c57c2e632b5694
+FROM mcr.microsoft.com/dotnet/sdk:9.0.303-noble@sha256:af75742bd2f6fd148504951b57a983bc410191729bf543eae467528d1bc175e5
 
 # Installing mono makes `dotnet test` work without errors even for net472.
 # But installing it takes a long time, so it's excluded by default.

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "9.0.301",
+    "version": "9.0.303",
     "rollForward": "patch",
     "allowPrerelease": false
   },