Create a relative link rather than an absolute link for docbook-xsl

diff --git a/stylesheets/evergreen_docbook_files/docbook-xsl b/stylesheets/evergreen_docbook_files/docbook-xsl
index 5a9e3ff..c6b4aca 120000 (symlink)
--- a/stylesheets/evergreen_docbook_files/docbook-xsl
+++ b/stylesheets/evergreen_docbook_files/docbook-xsl
@@ -1 +1 @@
-/home/rsoulliere/doctools/docbook-xsl-1.75.2
\ No newline at end of file
+docbook-xsl-1.75.2
\ No newline at end of file