build(deps): bump pypdf from 6.14.2 to 6.16.1

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 6.14.2 to 6.16.1.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](https://github.com/py-pdf/pypdf/compare/6.14.2...6.16.1)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.16.1
  dependency-type: direct:production
...

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

uv.lock

@@ -1849,11 +1849,11 @@ crypto = [
 
 [[package]]
 name = "pypdf"
-version = "6.14.2"
+version = "6.16.1"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/03/72/7dfd5ff1c9c37de97a731701f51af091325f123d9d4270361c9c69e4431f/pypdf-6.14.2.tar.gz", hash = "sha256:7873f502fe4385e79539b21d872392dc0c4e3714327c15881cbc7fbfd1f95b25", size = 6491182, upload-time = "2026-06-23T14:18:30.859Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/b6/5a/df92d1c1ef8806ca28f20f978ee059894868d93de797a7e2edebe7fe1a43/pypdf-6.16.1.tar.gz", hash = "sha256:c4d1b43ddae921387321cf63936cd16a7743b91d2da92f165c149a195c972ba9", size = 7003737, upload-time = "2026-08-14T12:24:04.531Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/49/e6/136aa8993a2ae7214e0b0ef2edaa0d2e08d1d4e4982635b08a835ff31ec8/pypdf-6.14.2-py3-none-any.whl", hash = "sha256:3f07891af76dc002657e04993ab9b4de81de29f9013b9761d0b7968bff12e946", size = 349514, upload-time = "2026-06-23T14:18:28.867Z" },
+    { url = "https://files.pythonhosted.org/packages/33/a1/724b18d6757ab7253a8fecd3a430eb8d980ed26872ba16651e7b5ddfc63f/pypdf-6.16.1-py3-none-any.whl", hash = "sha256:63fec31c4092ae50b6729beedcb469055b60d20c834bde1c402df241f371f644", size = 382924, upload-time = "2026-08-14T12:24:02.854Z" },
 ]
 
 [[package]]