Fix help button

[johnpierson]

Describe the bug
(Please fill in. A clear and concise description of what the bug is. In most cases, it will be helpful if you include journal files.)

Steps to Reproduce
(Please fill in. What did you do, step by step?)

Expected behavior
(Please fill in. A clear and concise description of what you expected to happen.)

My setup

• Operating System: ................
• Dynamo version: ................
• Rhythm version: ................
• Revit version: ................