Log Message:
shells/starship: update to 1.6.3

1.6.3 (2022-04-26)
Bug Fixes
    git_branch: correct variable name for remote branch (#3897) (bd7957f)
    schema: move config-schema into docs folder (#3878) (094f982)

Performance Improvements
    package: only try to read files that exist (#3904) (2a650bf)

Reverts
    schema: move config-schema back into .github folder (#3886) (9b2ce42)