Resolve "Wrong icon for fixed vulnerability in Container Scanning report"

What does this MR do?

Turns out this was a really small fix in the end as the fixed results were mapped to the wrong prop in the Vue component. Mapping it to the correct one fixed the icon.

Unfortunately I have no idea where to even start with a test for this as the testing for this seems to be a bit of a house of cards. I'm happy to be shown where/how to add one if it's needed though.

What are the relevant issue numbers?

Closes #8412 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• ~~Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.~~
• EE specific content should be in the top level /ee folder
• For a paid feature, have we considered GitLab.com plans, how it works for groups, and is there a design for promoting it to users who aren't on the correct plan?
• Security reports checked/validated by reviewer