[PRM-461] Bump pypdf from 5.3.0 to 6.0.0 (#746)

Bumps the pip group with 1 update in the /lambdas/requirements/layers directory: [pypdf](https://github.com/py-pdf/pypdf).


Updates `pypdf` from 5.3.0 to 6.0.0
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@5.3.0...6.0.0)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.0.0
  dependency-type: direct:production
  dependency-group: pip
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

lambdas/requirements/layers/requirements_core_lambda_layer.txt

@@ -11,7 +11,7 @@ jmespath==1.0.1
 oauthlib==3.2.2
 packaging==23.0.0
 pydantic==2.11
-pypdf==5.3.0
+pypdf==6.0.0
 requests==2.32.4
 responses==0.23.1
 six==1.16.0