Update image (#18)

Author: bamurtaugh

.devcontainer/Dockerfile

@@ -1,7 +1,7 @@
 # See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.195.0/containers/cpp/.devcontainer/base.Dockerfile
 # [Choice] Debian / Ubuntu version (use Debian 11/9, Ubuntu 18.04/21.04 on local arm64/Apple Silicon): debian-11, debian-10, debian-9, ubuntu-21.04, ubuntu-20.04, ubuntu-18.04
 ARG VARIANT=debian-11
-FROM mcr.microsoft.com/vscode/devcontainers/cpp:0-${VARIANT}
+FROM mcr.microsoft.com/devcontainers/cpp:0-${VARIANT}
 
 # [Optional] Uncomment this section to install additional packages.
 # RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \