Fix code scanning alert - Uncontrolled data used in path expression

[chensuyue]

Tracking issue for:

• https://github.com/opea-project/GenAIExamples/security/code-scanning/20

[tileintel]

@xiguiw isn't this one handled already and merged already? I cannot open the link above anymore. Could you please point me to the PR that has this security issue if unresolved yet?

[xiguiw]

@tileintel Yes, it is merged.
I assigned it to you because you resolved the issue. Just to make sure issues are tracked (and processed).

Thank you!