Increase the memory for the example for the 7b model to load properly

[kenthua]

Description

Loading this model requires additional memory

Tasks

• [x] The contributing guide has been read and followed.
• [x] The samples added / modified have been fully tested.
• [ ] Workflow files have been added / modified, if applicable.
• [ ] Region tags have been properly added, if new samples.
• [ ] All dependencies are set to up-to-date versions, as applicable.