Clarify pronoun in hash map resizing explanation

[smailoujaoura]

Replaced the ambiguous pronoun “it” with “the load factor” in the hash map resizing explanation. This makes it clearer that the sentence refers to the load factor value, not the number of buckets. The update improves readability and prevents confusion for learners.

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Closes #XXXXX

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[rlmoser99]

Thank you for taking the time to update this lesson. However, we have the lesson duplicated in the Ruby curriculum, so this will need to be updated in that lesson before we can approve this one.

In addition, if you would be so willing, there are a few linter issues highlighted on this PR that needs to be fixed. We are trying to ensure that all of our lessons follow the same pattern and you can find more details in our style guide.

https://github.com/TheOdinProject/curriculum/blob/main/LAYOUT_STYLE_GUIDE.md