[Snyk] Security upgrade zipp from 3.15.0 to 3.19.1

[VaniHaripriya]

This PR was automatically created by Snyk using the credentials of a real user.


Snyk has created this PR to fix 1 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• backend/requirements.txt

⚠️ Warning

``` importlib-metadata 6.7.0 requires zipp, which is not installed.

</details>





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