Left-align QR-Code (hack)

As suggested by @volz

This is a hack because the qrcode svg itself contains a margin that
cannot be changed easily.

Change-Id: I36bc026dc5bab42b37fe4530812a77044d463ee3
diff --git a/inst/rmarkdown/templates/posterdown_ids/resources/template.html b/inst/rmarkdown/templates/posterdown_ids/resources/template.html
index fcf2e74..b211371 100644
--- a/inst/rmarkdown/templates/posterdown_ids/resources/template.html
+++ b/inst/rmarkdown/templates/posterdown_ids/resources/template.html
@@ -298,6 +298,7 @@
 
 #info-column .qrcode {
   margin-bottom: 5em;
+  margin-left: -10px;
 }
 
 @media print {