Bump pypdf from 3.17.0 to 6.0.0 in /application

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 3.17.0 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@3.17.0...6.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

application/requirements.txt

@@ -4,7 +4,7 @@ faiss-cpu==1.8.0
 openai==1.17.0
 streamlit==1.37.0
 duckduckgo-search==3.8.3
-pypdf==3.17.0
+pypdf==6.0.0
 sentence-transformers==2.2.2
 docarray==0.32.1
 streamlit-code-editor