fix broken link to ganeti anchor

howto/new-machine.md

@@ -38,7 +38,7 @@ release, testing. Here are site-specific installs:
 * [Hetnzer Cloud](howto/new-machine-hetzner-cloud)
 * [Hetzner Robot](howto/new-machine-hetzner-robot)
 * [Ganeti](howto/ganeti) clusters:
-  * new virtual machine: [new instance procedure](howto/ganeti#Adding_a_new_instance)
+  * new virtual machine: [new instance procedure](howto/ganeti#adding-a-new-instance)
   * new *nodes* (which host virtual machines) [new node
     procedure](howto/ganeti#installation), normally done as a post-install configuration
 * Linaro and OSUOSL: [howto/openstack](howto/openstack)