fix commas in 1.0-Release examples courseInstance and trainingMaterial

[Brilator]

Description

• fixed missing commas

Have these been tested?

• no

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New content (non-breaking change which adds new content)
• [x] Modified content (non-breaking change which modifies existing content)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)