Fix link to README.md file of download.html

Change-Id: I76065c13c9a61b30cab444cd33bd6833218589eb
Signed-off-by: Bernd Hufmann <Bernd.Hufmann@ericsson.com>
diff --git a/download.html b/download.html
index d9733d3..ff7a098 100644
--- a/download.html
+++ b/download.html
@@ -217,7 +217,7 @@
 
 				<p>
 					See the <a
-						href="http://git.eclipse.org/c/tracecompass/org.eclipse.tracecompass.git/about/"><code>README.md</code>
+						href="https://git.eclipse.org/c/tracecompass/org.eclipse.tracecompass.git/plain/README.md/"><code>README.md</code>
 						file</a> for build instructions.
 				</p>