Bump powershell from 7.1.3-alpine-3.12-20210803 to 7.3.0-preview.1-alpine-3.12-20211215#16

dependabot[bot] wants to merge 1 commit intomainmicrosoft/ps-docs:mainfrom

dependabot/docker/powershell-7.3.0-preview.1-alpine-3.12-20211215microsoft/ps-docs:dependabot/docker/powershell-7.3.0-preview.1-alpine-3.12-20211215Copy head branch name to clipboard