doc: Fix link to FreeBSD documentation project

danielgustafsson · pull[bot] · commit b4a01e8b92b9 · 2023-02-12T13:53:02.000Z
The FreeBSD site was changed with a redirect, which in turn seems to lead to a 404. Replace with the working link. Author: James Coleman <jtc331@gmail.com> Discussion: https://postgr.es/m/CAAaqYe_JZRj+KPn=hACtwsg1iLRYs=jYvxG1NW4AnDeUL1GD-Q@mail.gmail.com
diff --git a/doc/src/sgml/docguide.sgml b/doc/src/sgml/docguide.sgml
@@ -63,7 +63,7 @@
    a complete O'Reilly book for your online reading pleasure.  The
    <ulink url="http://newbiedoc.sourceforge.net/metadoc/docbook-guide.html">
    NewbieDoc Docbook Guide</ulink> is very helpful for beginners.
-   The <ulink url="https://www.freebsd.org/docproj/docproj.html">
+   The <ulink url="https://www.freebsd.org/docproj/">
    FreeBSD Documentation Project</ulink> also uses DocBook and has some good
    information, including a number of style guidelines that might be
    worth considering.
