docs: rpc help correction

[thephez]

Issue being fixed or feature implemented

Help field showed wrong type

What was done?

Changed height to number instead of string

How Has This Been Tested?

Locally

Breaking Changes

N/A

Checklist:

Go over all the following points, and put an x in all the boxes that apply.

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation
• I have assigned this pull request to a milestone (for repository code-owners and collaborators only)

[PastaPastaPasta]

utACK for squash merge

[UdjinM6]

utACK