`Install/Uninstall-Font`: Set `Path` parameter type to `string[]`

[yuusakuri]

example

  [parameter(
    Mandatory,
    ParameterSetName = 'Path',
    Position = 0,
    ValueFromPipeline,
    ValueFromPipelineByPropertyName
  )]
  [ValidateNotNullOrEmpty()]
  [SupportsWildcards()]
  [string[]]
  $Path,

  [parameter(
    Mandatory,
    ParameterSetName = 'LiteralPath',
    Position = 0,
    ValueFromPipelineByPropertyName
  )]
  [ValidateNotNullOrEmpty()]
  [Alias('PSPath')]
  [string[]]
  $LiteralPath