Update Dockerfile and global.json updates to v9.0.305

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:9.0.304-noble@sha256:1f7ccf88e076bc1cb1ddbd81959fb55b886b01851b092867bb7a638435fa1f1f
+FROM mcr.microsoft.com/dotnet/sdk:9.0.305-noble@sha256:9ae2f68485dc3385e76e38524806fd159988b6e525ea5f27a4870bdf8bc0fe72
 
 # 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": "9.0.304",
+    "version": "9.0.305",
     "rollForward": "patch",
     "allowPrerelease": false
   },