add missing sidebar link to new google_compute_subnetwork resource

Author: sl1pm4t

website/source/layouts/google.erb

@@ -81,6 +81,10 @@
 			<a href="/docs/providers/google/r/compute_ssl_certificate.html">google_compute_ssl_certificate</a>
 			</li>
 
+			<li<%= sidebar_current("docs-google-compute-subnetwork") %>>
+			<a href="/docs/providers/google/r/compute_subnetwork.html">google_compute_subnetwork</a>
+			</li>
+
 			<li<%= sidebar_current("docs-google-compute-target-http-proxy") %>>
 			<a href="/docs/providers/google/r/compute_target_http_proxy.html">google_compute_target_http_proxy</a>
 			</li>