0.3.1

[jaredforth]

• update copyright
• bump version

[Copilot]

Pull Request Overview

This PR performs routine maintenance tasks to prepare for the 0.3.1 release, including version bumping and copyright correction.

• Updates package version from 0.3.0 to 0.3.1 in Cargo.toml
• Corrects copyright file to reference "webp" instead of "fsutils"

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
Cargo.toml	Updates package version to 0.3.1
COPYRIGHT	Fixes project name reference from "fsutils" to "webp"

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