add "Acellerator: None" on Creating a Workbench form (#98)

* add "Acellerator: None" on Creating a Workbench form

If the cluster has GPUs available, the Create a Workbench form will
display the options in an "Accelerator" dropdown in the "Deployment
size" section of the form.

Guide users to not select an Accelerator for this workshop.

Thanks Erwan Granger <32554862+erwangranger@users.noreply.github.com>
for pointing this out to me.

Co-authored-by: Melissa Flinn <31925014+MelissaFlinn@users.noreply.github.com>

* Update creating-a-workbench.adoc

made a small change (changed the line from a NOTE to a step) - since it is a required step if the Accelerators section appears, and also to avoid breaking the numbering of steps. (You'd need to add a + to  indent the NOTE under a step and to avoid restarting the step numbering)

---------

Co-authored-by: Melissa Flinn <31925014+MelissaFlinn@users.noreply.github.com>

Author: ktdreyer

workshop/docs/modules/ROOT/pages/creating-a-workbench.adoc

@@ -32,6 +32,8 @@ image::workbenches/create-workbench-form-image.png[Workbench image, 600]
 +
 image::workbenches/create-workbench-form-size.png[Workbench size, 600]
 
+. If your OpenShift cluster has available GPUs, the *Create workbench* form includes an *Accelerator* option. Select *None*. This {deliverable} does not require any GPUs.
+
 . Leave the default environment variables and storage options.
 +
 image::workbenches/create-workbench-form-env-storage.png[Workbench storage, 600]
@@ -57,4 +59,4 @@ image::workbenches/ds-project-workbench-list-edit.png[Workbench list edit, 350]
 
 .Next step
 
-xref:importing-files-into-jupyter.adoc[Importing the {deliverable} files into the JupyterLab environment]
+xref:importing-files-into-jupyter.adoc[Importing the {deliverable} files into the JupyterLab environment]