Bump pypdf from 6.0.0 to 6.9.2

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 6.0.0 to 6.9.2.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@6.0.0...6.9.2)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.9.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements-gui.txt

@@ -22,4 +22,4 @@ wsproto==1.2.0
 
 # PDF preview functionality in GUI
 # Used in: simulation/gui/server/utils.py
-pypdf==6.0.0
+pypdf==6.9.2