add sudo requirement (#3511)

* add sudo requirement

* formatting

* Update docs/partials/embedded-cluster/_requirements.mdx

Co-authored-by: Alex Parker <[email protected]>

---------

Co-authored-by: Alex Parker <[email protected]>

Author: paigecalvert

docs/partials/embedded-cluster/_requirements.mdx

@@ -8,6 +8,8 @@
 
 * The disk on the host must have a maximum P99 write latency of 10 ms. This supports etcd performance and stability. For more information about the disk write latency requirements for etcd, see [Disks](https://etcd.io/docs/latest/op-guide/hardware/#disks) in _Hardware recommendations_ and [What does the etcd warning “failed to send out heartbeat on time” mean?](https://etcd.io/docs/latest/faq/) in the etcd documentation.
 
+* The user performing the installation must have root access to the machine, such as with `sudo`.
+
 * The data directory used by Embedded Cluster must have 40Gi or more of total space and be less than 80% full. By default, the data directory is `/var/lib/embedded-cluster`. The directory can be changed by passing the `--data-dir` flag with the Embedded Cluster `install` command. For more information, see [install](/reference/embedded-cluster-install).
 
    Note that in addition to the primary data directory, Embedded Cluster creates directories and files in the following locations: