fix example workspace name if none is provided

[KatherineCox]

fix student example Workspace name so that if no Workspace name is provided it uses ExampleWorkspace_Firstname_Lastname

previously it was using specified by your instructor_Firstname_Lastname

[github-actions[bot]]

No spelling errors! :tada: Comment updated at 2023-02-02 with changes from 38e00e5773908fceb718420e693da35f8d9aa661

[github-actions[bot]]

No broken urls! :tada: Comment updated at 2023-02-02 with changes from 38e00e5773908fceb718420e693da35f8d9aa661

[github-actions[bot]]

Re-rendered previews from the latest commit:

• See preview of Bookdown here
• See preview of Coursera/Leanpub version here
• Download the preview of the Student Guide .docx file

Updated at 2023-02-02 with changes from 38e00e5773908fceb718420e693da35f8d9aa661