Fixed EVM Metrics with a small modexp->exp bug

[MarekM25]

Changes

Fixed a small mistake in EVM metrics

Types of changes

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• Bugfix (a non-breaking change that fixes an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a change that causes existing functionality not to work as expected)
• Optimization
• Refactoring
• Documentation update
• Build-related changes
• Other: Description

Testing

Requires testing

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If yes, did you write tests?

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Notes on testing

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Documentation

Requires documentation update

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If yes, link the PR to the docs update or the issue with the details labeled docs. Remove if not applicable.

Requires explanation in Release Notes

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• No

Renamed one metric ModExpOpcode -> ExpOpcode

Remarks

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