Update module golang.org/x/image to v0.18.0 [SECURITY]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
golang.org/x/image	`v0.16.0` -> `v0.18.0`

GitHub Vulnerability Alerts

CVE-2024-24792

Parsing a corrupt or malicious image with invalid color indices can cause a panic.

Configuration

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 0.00%. Comparing base (a6835cc) to head (0ee3122).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #212 +/- ## ====================================== Coverage 0.00% 0.00% ====================================== Files 10 10 Lines 347 347 ====================================== Misses 347 347 ``` | [Flag](https://app.codecov.io/gh/pion/example-webrtc-applications/pull/212/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pion) | Coverage Δ | | |---|---|---| | [wasm](https://app.codecov.io/gh/pion/example-webrtc-applications/pull/212/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pion) | `0.00% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pion#carryforward-flags-in-the-pull-request-comment) to find out more.

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pion / example-webrtc-applications