website: Add version command to sidebar nav and to plugins overview page

website/docs/cli/plugins/index.html.md

@@ -37,6 +37,10 @@ more information, see [CLI Config File](/docs/commands/cli-config.html).
 Use the [`terraform providers`](/docs/commands/providers.html) command to get information
 about the providers required by the current working directory's configuration.
 
+Use the [`terraform version`](/docs/commands/version.html) command (or
+`terraform -version`) to show the specific provider versions installed for the
+current working directory.
+
 Use the [`terraform providers schema`](/docs/commands/providers/schema.html) command to
 get machine-readable information about the resources and configuration options
 offered by each provider.

website/layouts/docs.erb

@@ -291,6 +291,10 @@
             <a href="/docs/commands/providers.html"><code>providers</code></a>
           </li>
 
+          <li>
+            <a href="/docs/commands/version.html"><code>version</code></a>
+          </li>
+
           <li>
             <a href="/docs/commands/providers/lock.html"><code>providers lock</code></a>
           </li>
@@ -469,6 +473,10 @@
             <a href="/docs/commands/validate.html"><code>validate</code></a>
           </li>
 
+          <li>
+            <a href="/docs/commands/version.html"><code>version</code></a>
+          </li>
+
           <li>
             <a href="/docs/commands/workspace/list.html"><code>workspace list</code></a>
           </li>