Update detector-arguments.md to show correct argument for Python detectors

[mnitchie]

Correct detector-arguments.md to show the correct category for Python detectors. When using Pip:

$ omponent-detection scan --SourceDirectory . --ManifestFile ./output.json --DetectorCategories Pip
[17:29:15 ERR] An error occurred while executing the command
Microsoft.ComponentDetection.Orchestrator.Exceptions.InvalidDetectorCategoriesException: Categories Pip did not match any available detectors.
   at Microsoft.ComponentDetection.Orchestrator.Services.DetectorRestrictionService.ApplyRestrictions(DetectorRestrictions restrictions, IEnumerable`1 detectors)
   at Microsoft.ComponentDetection.Orchestrator.Services.ScanExecutionService.ExecuteScanAsync(ScanSettings settings)
   at Microsoft.ComponentDetection.Orchestrator.Commands.ScanCommand.ExecuteAsync(CommandContext context, ScanSettings settings)
   at Spectre.Console.Cli.CommandExecutor.Execute(CommandTree leaf, CommandTree tree, CommandContext context, ITypeResolver resolver, IConfiguration configuration) in /_/src/Spectre.Console.Cli/Internal/CommandExecutor.cs:line 166

When using Python:

$ component-detection scan --SourceDirectory . --ManifestFile ./output.json --DetectorCategories Python
[17:41:47 INF] Finding components...

[Copilot]

Pull request overview

Updates the CLI documentation for --DetectorCategories to reflect the correct category name used by Python-related detectors in Component Detection.

Changes:

• Replace Pip with Python in the documented list of supported --DetectorCategories values.

[Copilot]

This section is presented as the output of ... help scan, but the actual CLI help text for --DetectorCategories is sourced from ScanSettings and still lists Pip (not Python). As-is, the docs will no longer match what users see when they run the command shown above; consider updating the ScanSettings option description to Python as well (or adjust this doc to avoid implying the snippet is verbatim CLI output).

Suggested change

	Npm, NuGet, Maven, RubyGems, Cargo, Python, GoMod,
	Npm, NuGet, Maven, RubyGems, Cargo, Pip, GoMod,