docs/website/support.html: add Benetti Engineering to the commercial support list

As Benetti Engineering I keep contributing since 8 years more or less on
many packages and I've learnt a lot by joining this community. Most of all
I've received precious reviews from maintainers of today and yesterday.
Also, finally I've found some time to create my company logo and so let's
add Benetti Engineering to commercial support using LinkedIn page as
placeholder until the final website will be ready.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Acked-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

docs/website/support.html

@@ -139,6 +139,9 @@
 	    <a href="https://www.amarulasolutions.com/services/integrated-system/">
 	      <img src="images/amarula-solutions-logo.png" style="max-width:200px; margin-right:40px;"/>
 	    </a>
+	    <a href="https://www.linkedin.com/company/benetti-engineering-sas">
+	      <img src="images/benetti-engineering-logo.png" style="max-width:260px; margin-right:40px;"/>
+	    </a>
 	  </center>
 	</div>
       </div>