Fix url to postdoc offer

Author: nburgos

docs/pages/job_offers.html

@@ -147,7 +147,7 @@ <h1 style="font-weight:bold; color: #702082;">JOIN THE TEAM</h1>
                 <h2 style="font-weight:bold; color: #702082;">Postdocs / Scientists</h2>
                 <ul>
                   <li>
-                    <a href="job_offers/2021/02/postdoc_EN-v1.pdf">Deep Learning for Brain Imaging</a> <br> 
+                    <a href="../job_offers/2021/02/postdoc_EN-v1.pdf">Deep Learning for Brain Imaging</a> <br> 
                     <span style="font-weight: bold;">Duration:</span> from 1 to 3 years &#8211; 
                     <span style="font-weight: bold;">Starting date:</span>  anytime &#8211; 
                     <span style="font-weight: bold;">Contact:</span> [email protected]