Update missing closed brace to the insert.CSS

[mosabab]

Platforms affected

all

Motivation and Context

Update missing closed brace to the insert.CSS

Description

Update missing closed brace to the insert.CSS

Testing

Update missing closed brace to the insert.CSS

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[timbru31]

Oh boi, another one? Thanks!