Decrease vertical margins around pars

Change-Id: I2db0392818faeefcea65f72abe17524c2b4a1eb9
diff --git a/inst/rmarkdown/templates/posterdown_ids/resources/template.html b/inst/rmarkdown/templates/posterdown_ids/resources/template.html
index 1b8572b..1c5489d 100644
--- a/inst/rmarkdown/templates/posterdown_ids/resources/template.html
+++ b/inst/rmarkdown/templates/posterdown_ids/resources/template.html
@@ -362,8 +362,8 @@
 margin-bottom: 10px;
 }
 .poster_body p {
-margin-top: 6mm;
-margin-bottom: 10mm;
+margin-top: 2mm;
+margin-bottom: 6mm;
 color: $if(body_textcol)$$body_textcol$$else$#000000$endif$
 }
 .poster_body ol {