chore(deps): update dockerfile and global.json updates

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:9.0.306-noble@sha256:d88e637d15248531967111fba05c6725ad45ea1dace3d35d8cfe2c4d4094e25d
+FROM mcr.microsoft.com/dotnet/sdk:9.0.308-noble@sha256:5646faeafd2992e0b75f44ce8afc6f79a398e767aff5e9ed5579cce5e6047f25
 
 # 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": "9.0.306",
+    "version": "9.0.307",
     "rollForward": "patch",
     "allowPrerelease": false
   }