fix: mark the imageName parameter in the loadImageFromURL type definition as required (fix: #842)

[marlo22]

Please check if the PR fulfills these requirements

• [X] It's submitted to right branch according to our branching model
• [X] It's right issue type on title
• [X] When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
• [X] The commit message follows our guidelines
• [X] Tests for the changes have been added (for bug fixes/features)
• [X] Docs have been added/updated (for bug fixes/features)
• [X] It does not introduce a breaking change or has description for the breaking change

[stale[bot]]

This issue has been automatically marked as inactive because there hasn’t been much going on it lately. It is going to be closed after 7 days. Thanks!