setup-plt -> raco setup

Survived unnoticed for 6+ years.

scribble-doc/scribblings/scribble/base.scrbl

@@ -605,7 +605,7 @@ Inserts a reference to the section tagged @racket[tag].
 
 If @racket[#:doc module-path] is provided, the @racket[tag] refers to
 a tag with a prefix determined by @racket[module-path]. When
-@exec{setup-plt} renders documentation, it automatically adds a tag
+@exec{raco setup} renders documentation, it automatically adds a tag
 prefix to the document based on the source module. Thus, for example,
 to refer to a section of the Racket reference,
 @racket[module-path] would be @racket['(lib

scribble-doc/scribblings/scribble/config.scrbl

@@ -172,7 +172,7 @@ configurable in the former way, since a document class determines a
 set of page-layout and font properties that are used by other
 commands. The style-replacement kind of configuration corresponds to
 re-defining Latex macros or overriding CSS class attributes.  When
-@exec{setup-plt} builds PDF documentation, it uses both kinds of
+@exec{raco setup} builds PDF documentation, it uses both kinds of
 configuration to produce a standard layout for Racket manuals;
 that is, it selects a particular page layout, and it replaces some
 @racketmodname[racket/base] styles.

scribble-doc/scribblings/scribble/core.scrbl

@@ -463,7 +463,7 @@ The recognized @tech{style properties} are as follows:
         be set separately for parts that start different HTML pages,
         otherwise it is effectively inherited by sub-parts; the
         default is @racket["scribble-racket-lang.org"], but
-        @exec{setup-plt} installs @racket["doc-racket-lang.org"] as the
+        @exec{raco setup} installs @racket["doc-racket-lang.org"] as the
         @tt{id} for any document that it builds.}
 
  @item{@racket[attributes] structure --- Provides additional HTML