fix one more broken link

doc/src/Install_patch.txt

@@ -17,10 +17,11 @@ how to stay current are on the "Install git"_Install_git.html and
 If you prefer to download a tarball, as described on the "Install
 git"_Install_tarball.html doc page, you can stay current by
 downloading "patch files" when new patch releases are made.  A link to
-a patch file is posted on the "bug and feature page"_bug of the
-website, along with a list of changed files and details about what is
-in the new patch release.  This page explains how to apply the patch
-file to your local LAMMPS directory.
+a patch file is posted on the "bug and feature 
+page"_http://lammps.sandia.gov/bug.html of the LAMMPS website, along
+with a list of changed files and details about what is in the new patch
+release.  This page explains how to apply the patch file to your local
+LAMMPS directory.
 
 NOTE: You should not apply patch files to a local Git or SVN repo of
 LAMMPS, only to an unpacked tarball.  Use Git and SVN commands to