Update devcontainer image version to v1.2.0

Author: eps-create-pull-request[bot]

.devcontainer/devcontainer.json

@@ -6,7 +6,7 @@
     "args": {
       "DOCKER_GID": "${env:DOCKER_GID:}",
       "IMAGE_NAME": "node_24_python_3_14_java_24",
-      "IMAGE_VERSION": "v1.1.3",
+      "IMAGE_VERSION": "v1.2.0",
       "USER_UID": "${localEnv:USER_ID:}",
       "USER_GID": "${localEnv:GROUP_ID:}"
     }
@@ -65,6 +65,5 @@
     "LOCAL_WORKSPACE_FOLDER": "${localWorkspaceFolder}"
   },
   "postAttachCommand": "git-secrets --register-aws; git-secrets --add-provider -- cat /usr/share/secrets-scanner/nhsd-rules-deny.txt",
-  "features": {
-  }
+  "features": {}
 }