Fix mixed tab/space indentation in root.go help text

[ewega]

Problem

Line 24 of root.go uses a tab character on the line 2. gh devlake configure full while surrounding lines use 2-space indent:

`

1. gh devlake deploy local # spin up DevLake with Docker Compose
2. gh devlake configure full # create connections + scopes + project
3. gh devlake status # verify everything is healthy
   `

This causes misalignment when users run gh devlake --help in terminals with different tab-width settings (4 vs 8 characters).

Fix

Replace the tab on line 24 with two spaces to match the rest of the list.

Acceptance Criteria

• gh devlake --help output is visually aligned in all terminals
• go build ./... passes

[ewega]

Agent context: This is a trivial fix. Line 24 of cmd/root.go uses a tab character instead of 2-space indent on the 2. gh devlake configure full line. Replace the tab with 2 spaces to match the surrounding lines. Build with go build ./... and test with go test ./....