docs: fix apikey create command example in README

[xrehpicx]

Description

Fixes incorrect example in README.md for the apikey create command.

Changes

• Changed anytype auth apikey create --name "my-app" to anytype auth apikey create "my-app"
• The command expects the name as a positional argument, not a flag

Testing

Verified by checking the command implementation in cmd/auth/apikey/create/create.go which shows:

• Use: "create <name>" - name is a positional argument
• Args: cmdutil.ExactArgs(1, ...) - requires exactly 1 argument

The README had an inconsistency - line 53 shows the correct usage, but line 159 showed incorrect usage with --name flag.

[jmetrikat]

Thanks for spotting - i've addressed the overall positional argument consistency as part of #11.