Rbase images all use R version >= 4.5.0

[connershoop]

When building from Rbase images, 14.3-LTS, 15.4-LTS, and 16.4-LTS, and running RUN R --version in the Dockerfile, they all output:

"R version 4.5.0 (2025-04-11) -- "How About a Twenty-Six""

I was expecting R version 4.4.0 as stated here: https://learn.microsoft.com/en-us/azure/databricks/release-notes/runtime/16.4lts#system-environment, and as set in the Dockerfile: https://github.com/databricks/containers/blob/master/ubuntu/R/Dockerfile#L16.

This can be reproduced with docker run --rm -it databricksruntime/rbase:16.4-LTS R --version