docker: bump rocker/shiny from 4.4 to 4.5#1

GeiserX merged 1 commit intomainGeiserX/ePubLangMerger:mainfrom

dependabot/docker/rocker/shiny-4.5GeiserX/ePubLangMerger:dependabot/docker/rocker/shiny-4.5Copy head branch name to clipboard