Check Spelling errors (Storm migration guide)

[sfadriaan]

As per the issue raised in the Open Documentation Academy (Issue canonical/open-documentation-academy#77), the page "Database Performance" was removed from the exclusion list and make spelling was run to include it in the spell checker.

Some comments with regards to the changes:

• A lot of inline code was incorrectly formatted which resulted in the code snippets popping up as spelling errors. The formatting was corrected which removed them from being checked by the spell checker
• The "Questions" section's formatting was inconsistent and was standardized throughout the section

I am also not quite convinced on the formatting of the section "Tips on Converting Tests", but left it as is, as I assume it will be addressed when there is a comprehensive review of the documentation.

Thanks

[jugmac00]

Thank you!