fix(timesheets): Fixed typos

[t-dub]

Description

Corrected two typos in form and sheet headers. Additionally removed stray whitespace.

Is it been tested?

• [x] Development testing done

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have performed a peer-reviewed with team member(s)
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] Any dependent changes have been merged and published in downstream modules