Fix qhelp

Author: atorralba

java/ql/src/Security/CWE/CWE-441/UnsafeContentUriResolution.qhelp

@@ -28,12 +28,12 @@
 </p>
 </recommendation>
 <example>
+<p>
   This example shows two ways of opening a file using a <code>ContentResolver</code>. In the first case, externally-provided
   data coming from an intent is directly used in the file-reading operation, allowing an attacker to provide a URI
   of the form <code>/data/data/(vulnerable app package)/(private file)</code> to trick the application into reading it and
   copying it to the external storage. In the second case, the URI is validated before being used, making sure it does not reference
   any internal application files.
-<p>
 </p>
 <sample src="UnsafeContentUriResolution.java" />
 </example>