fix: typos in documentation files

[kilavvy]

Description

Corrected "Developent" → "Development"
Corrected "initalHeaderTitle" → "initialHeaderTitle"

This pull request contains changes to improve clarity, correctness and structure.

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

Type of change

• Typo correction

[trechriron]

const is only implemented in the same file. No instances elsewhere.

The base branch was changed.

[trechriron]

@kilavvy - you need to include the checklists AND a description. Correct selections need to be made in the checklist.

You may want to close this PR and create a new one if you don't mind. On initial creation, you can go to preview to select the correct template, which automatically copies text to the description. Once you save initially, it's easy to make the selections.

Thanks!

[kilavvy]

@kilavvy - you need to include the checklists AND a description. Correct selections need to be made in the checklist.

You may want to close this PR and create a new one if you don't mind. On initial creation, you can go to preview to select the correct template, which automatically copies text to the description. Once you save initially, it's easy to make the selections.

Thanks!

corrected