update docs

Author: JoeWang1127

doc/library-maintainer-guide.md

@@ -5,8 +5,6 @@ maintainers. See the
 [generated CLI documentation](https://pkg.go.dev/github.com/googleapis/librarian/cmd/librarian)
 for a more comprehensive list of commands and flags.
 
-For configuring development environment, please see [onboarding](onboarding.md).
-
 For libraries onboarded to automation, please see [automation section below](#using-automated-releases).
 
 This guide uses the term Librarian (capital L, regular font) for the overall
@@ -17,6 +15,10 @@ Librarian system, and `librarian` (lower case L, code font) for the CLI.
 If anything in this guide is unclear, please see go/g3doc-cloud-sdk-librarian-support
 for appropriate ways of obtaining more support.
 
+## Configuring development environment
+
+See [onboarding](onboarding.md).
+
 ## Running `librarian`
 
 There are various options for running `librarian`. We recommend using `go run`