chore(deps): bump pypdf from 6.13.3 to 6.14.2 in /mkdocs (#518)

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 6.13.3 to 6.14.2.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@6.13.3...6.14.2)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.14.2
  dependency-type: direct:production
...

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Author: dependabot[bot]

mkdocs/pyproject.toml

@@ -23,7 +23,7 @@ dependencies = [
     "langgraph-checkpoint>=4.1.1", # JsonPlusSerializer RCE in "json" mode
     "llama-index>=0.14.22,<0.15",
     "llama-index-core>=0.14.22,<0.15",
-    "pypdf>=6.13.3", # CVE-2026-*: decompression-bomb / RAM exhaustion in PDF parsing
+    "pypdf>=6.14.2", # CVE-2026-*: decompression-bomb / RAM exhaustion in PDF parsing
     "nltk>=3.10.0", # CVE-2025-14009: zip slip / RCE in downloader
     "orjson>=3.11.6", # CVE-2025-67221: recursion limit for deeply nested JSON
     "pillow>=12.3.0", # CVE-2025-48379, CVE-2026-25990