FDP: Fix typo

Reported by:	ceri

documentation/content/en/books/fdp-primer/tools/chapter.adoc

@@ -27,7 +27,7 @@ Several software tools are used to manage the FreeBSD documentation and render i
 [[tools-required]]
 == Required Tools
 
-Install `gohugo` and `rubygem-asciidoctor` as showed in <<overview,the overview chapter>> from the Ports Collection. These applications are required to do useful work with the FreeBSD documentation. Some further notes on particular components are given below.
+Install `gohugo` and `rubygem-asciidoctor` as shown in <<overview,the overview chapter>> from the Ports Collection. These applications are required to do useful work with the FreeBSD documentation. Some further notes on particular components are given below.
 
 [[tools-optional]]
 == Optional Tools