Update image (#46)

Author: bamurtaugh

.devcontainer/Dockerfile

@@ -1,7 +1,7 @@
 # See here for image contents: https://github.com/microsoft/vscode-dev-containers/blob/main/containers/java/.devcontainer/base.Dockerfile
 # [Choice] Java version (use -bullseye variants on local arm64/Apple Silicon): 8, 11, 17, 8-bullseye, 11-bullseye, 17-bullseye, 8-buster, 11-buster, 17-buster
 ARG VARIANT=11-bullseye
-FROM mcr.microsoft.com/vscode/devcontainers/java:${VARIANT}
+FROM mcr.microsoft.com/devcontainers/java:${VARIANT}
 
 # [Option] Install Maven
 ARG INSTALL_MAVEN="false"