Release v1.6.0 (#324)

* Update version and changelog for v1.6.0
* Update docs
diff --git a/docs/dyn/logging_v2.html b/docs/dyn/logging_v2.html
index a13b9c1..58b98d2 100644
--- a/docs/dyn/logging_v2.html
+++ b/docs/dyn/logging_v2.html
@@ -85,6 +85,11 @@
 <p class="firstline">Returns the entries Resource.</p>
 
 <p class="toc_element">
+  <code><a href="logging_v2.folders.html">folders()</a></code>
+</p>
+<p class="firstline">Returns the folders Resource.</p>
+
+<p class="toc_element">
   <code><a href="logging_v2.monitoredResourceDescriptors.html">monitoredResourceDescriptors()</a></code>
 </p>
 <p class="firstline">Returns the monitoredResourceDescriptors Resource.</p>