Resolves an issue fisher failing

[edheltzel]

The command fisher update is no longer supported by Fisher.
To update Fisher the command is now fisher

Standards checklist:

• The PR title is descriptive.
• The code compiles
• The code passes rustfmt
• The code passes clippy
• The code passes tests
• Optional: I have tested the code myself
  • I also tested that Topgrade skips the step where needed

If you developed a feature or a bug fix for someone else and you do not have the
means to test it, please tag this person here.

[r-darwish]

The documentation says that fisher update should be ran

[edheltzel]

The documentation says that fisher update should be ran

The docs are outdated -

this is the result of fisher update

~
❯ fisher update
fisher: unknown flag or command "update"
usage: fisher add <package...>     Add packages
       fisher rm  <package...>     Remove packages
       fisher                      Update all packages
       fisher ls  [<regex>]        List installed packages matching <regex>
       fisher --help               Show this help
       fisher --version            Show the current version
       fisher self-update          Update to the latest version
       fisher self-uninstall       Uninstall from your system
examples:
       fisher add jethrokuan/z rafaelrinaldi/pure
       fisher add gitlab.com/foo/bar@v2
       fisher add ~/path/to/local/pkg
       fisher add <file
       fisher rm rafaelrinaldi/pure
       fisher ls | fisher rm
       fisher ls fish-\*

according to the help info running just fisher will update all plugins.
I also have an issue reported with Fisher but it is unrelated to Topgrade.

[jorgebucaran]

@edheltzel You happen to be running an old Fisher. We don't need to change anything here. 😉

[edheltzel]

@jorgebucaran thanks!