Make table headers bold in fees page

[akshay-ap]

Describe the bug
Table headers need to be bold in fees page to make content more appealing and differentiate from non-header rows.
https://docs.oceanprotocol.com/core-concepts/fees
To Reproduce
NA

Expected behavior
NA

Screenshots
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Desktop (please complete the following information):
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Smartphone (please complete the following information):
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Additional context
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