fix(scripts): keep PowerShell branch-name acronym match case-sensitive (parity with bash)#3129

mnriem merged 2 commits into

github:maingithub/spec-kit:mainfrom

jawwad-ali:fix/powershell-branch-name-acronym-casejawwad-ali/spec-kit:fix/powershell-branch-name-acronym-caseCopy head branch name to clipboard