Update golang.org/x/image dependency

[jowko]

Hello.

This project uses golang.org/x/image in version v0.20.0.

Our dependency scanner discovered such CVEs in package golang.org/x/image:

• CVE-2026-46599 CVSS 7.5, fixed in version v0.41.0
• CVE-2026-33809 CVSS 5.3, fixed in version v0.38.0

Go documentation shows even more vulnerabilities to version up to v0.42.0: https://pkg.go.dev/golang.org/x/image?tab=versions

It would be good to bump this dependency since it is quite old (Sep 4, 2024).