[Bug Report] Example notebook has incorrectly formatted serving.properties

**Link to the notebook**
[Add the link to the notebook.](https://github.com/aws/amazon-sagemaker-examples/blob/main/inference/generativeai/llm-workshop/deploy-V7-lmi/llama2_70b-lmi-trtllm.ipynb)

**Describe the bug**
The example serving.properties written by this notebook is using spaces before and after the equals sign, which makes DJL ignore those values. E.g. key = value (incorrect) vs. key=value (correct).

**To reproduce**
N/A, see above

**Logs**
N/A, see above.

Open inference/generativeai/llm-workshop/deploy-V7-lmi/llama2_70b-lmi-trtllm.ipynb and locate the cell that writes serving.properties. Check the generated property formatting, then update it so assignments have no spaces around the equals sign and verify the notebook produces DJL-readable values.

Written by the indexing model from the issue text.