sysutils/pfetch: Update to 1.7.1

Changes since 1.7.0:

1.7.1

What's Changed

• Document values of PF_INFO by @polluks in #55
• Fixed typos by @polluks in #56
• Fixing a typo in README by @danielhejduk in #59

This release didn't add any new features, just typo fixes and documentation improvements

Full Changelog: https://github.com/Un1q32/pfetch/compare/1.7.0...1.7.1