add copy to contribution history page

[codenamejason]

Fixes: #issue

Description

Adds "* Please note that your recent transactions may take a short while to reflect in your donation history, as processing times may vary." to the contribution history page.

Checklist

This PR:

• Does it add new payout or donation token? In this case, have they been added to the indexer to avoid it to crash?
• Includes only changes relevant to the original ticket. Significant refactoring needs to be separated.
• Doesn't disable eslint rules.
• Doesn't work around the type checker (including but not limited to: type casts, non-null assertions, @ts-ignore, unjustified optional values).
• Doesn't contain commented out code.
• If adding/updating a feature, it adds/updates its test script on Notion.

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