Merge pull request #11189 from hashicorp/f-gh-11173-docs

docs: add changelog and website entry for #11173

.changelog/11173.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+client: Allow Docker hostnames to be configured and interpolated in bridged networking mode
+```

website/content/docs/job-specification/network.mdx

@@ -68,6 +68,11 @@ job "docs" {
   - `cni/<cni network name>` - Task group will have an isolated network namespace
     with the network configured by CNI.
 
+- `hostname` `(string: "")` - The hostname assigned to the network namespace. This
+  is currently only supported using the [Docker driver][docker-driver] and when the
+  [mode](#mode) is set to [`bridge`](#bridge). This parameter supports
+  [interpolation](/docs/runtime/interpolation).
+
 - `dns` <code>([DNSConfig](#dns-parameters): nil)</code> - Sets the DNS configuration
   for the allocations. By default all DNS configuration is inherited from the client host.
   DNS configuration is only supported on Linux clients at this time.