Bump pypdf in /PROJECTS/beginner/metadata-scrubber-tool

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 6.7.2 to 6.7.3.
- [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/6.7.2...6.7.3)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.7.3
  dependency-type: direct:production
...

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

PROJECTS/beginner/metadata-scrubber-tool/uv.lock

@@ -642,14 +642,14 @@ wheels = [
 
 [[package]]
 name = "pypdf"
-version = "6.7.2"
+version = "6.7.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "typing-extensions", marker = "python_full_version < '3.11'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/fe/b2/335465d6cff28a772ace8a58beb168f125c2e1d8f7a31527da180f4d89a1/pypdf-6.7.2.tar.gz", hash = "sha256:82a1a48de500ceea59a52a7d979f5095927ef802e4e4fac25ab862a73468acbb", size = 5302986, upload-time = "2026-02-22T11:33:30.776Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/53/9b/63e767042fc852384dc71e5ff6f990ee4e1b165b1526cf3f9c23a4eebb47/pypdf-6.7.3.tar.gz", hash = "sha256:eca55c78d0ec7baa06f9288e2be5c4e8242d5cbb62c7a4b94f2716f8e50076d2", size = 5303304, upload-time = "2026-02-24T17:23:11.42Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/df/df/38b06d6e74646a4281856920a11efb431559bdeb643bf1e192bff5e29082/pypdf-6.7.2-py3-none-any.whl", hash = "sha256:331b63cd66f63138f152a700565b3e0cebdf4ec8bec3b7594b2522418782f1f3", size = 331245, upload-time = "2026-02-22T11:33:29.204Z" },
+    { url = "https://files.pythonhosted.org/packages/b0/90/3308a9b8b46c1424181fdf3f4580d2b423c5471425799e7fc62f92d183f4/pypdf-6.7.3-py3-none-any.whl", hash = "sha256:cd25ac508f20b554a9fafd825186e3ba29591a69b78c156783c5d8a2d63a1c0a", size = 331263, upload-time = "2026-02-24T17:23:09.932Z" },
 ]
 
 [[package]]