fix(scoop-bucket): Check for git before running command

[rashil2000]

Hotfix for #4704

[niheaven]

The code LGTM, please update CHANGLOG

[HUMORCE]

> scoop bucket list
Get-Date: C:\Users\HUMOR\scoop\apps\scoop\current\libexec\scoop-bucket.ps1:42
Line |
  42 |  …  --date=format:"`"%d-%m-%Y %H:%M:%S`"" --format='%ad' -n 1 | Get-Date
     |                                                                 ~~~~~~~~
     | The input object cannot be bound to any parameters for the command either because the command does not
     | take pipeline input or the input and its properties do not match any of the parameters that take
     | pipeline input.
...

[rashil2000]

How to reproduce?

[HUMORCE]

[HUMORCE]

%ad
author date (format respects --date= option)

%aD
author date, RFC2822 style

if date formatting is not required, use %aD:

> git log --format='%aD' -n 1 | Get-Date

Thursday, February 24, 2022 12:03:00 PM

[rashil2000]

PowerShell 5.1

[rashil2000]

if date formatting is not required, use %aD:

Hmm, okay. Seems fine by me. Can you fix it?

[HUMORCE]

related to OS's datetime format. (unconfirmed)