pydpdf2 : update dep to pypdf

[krokoko]

Describe the bug

https://github.com/awslabs/generative-ai-cdk-constructs/security/dependabot/41

Expected Behavior

no vulnerability

Current Behavior

vulnerability

Reproduction Steps

N/A

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

n/a

Framework Version

No response

Node.js Version

n/a

OS

n/a

Language

Typescript

Language Version

No response

Region experiencing the issue

any

Code modification

no

Other information

No response

Service quota

• [X] I have reviewed the service quotas for this construct