Bump pypdf from 5.2.0 to 6.4.0 (#2768)

Bumps [pypdf](https://github.com/py-pdf/pypdf) from 5.2.0 to 6.4.0.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@5.2.0...6.4.0)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.4.0
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1509,9 +1509,9 @@ pyopenssl==25.0.0 ; python_version >= "3.10" and python_version < "4.0" \
 pyparsing==3.2.1 ; python_version >= "3.10" and python_version < "4.0" \
     --hash=sha256:506ff4f4386c4cec0590ec19e6302d3aedb992fdc02c761e90416f158dacf8e1 \
     --hash=sha256:61980854fd66de3a90028d679a954d5f2623e83144b5afe5ee86f43d762e5f0a
-pypdf==5.2.0 ; python_version >= "3.10" and python_version < "4.0" \
-    --hash=sha256:7c38e68420f038f2c4998fd9d6717b6db4f6cef1642e9cf384d519c9cf094663 \
-    --hash=sha256:d107962ec45e65e3bd10c1d9242bdbbedaa38193c9e3a6617bd6d996e5747b19
+pypdf==6.4.0 ; python_version >= "3.10" and python_version < "4.0" \
+    --hash=sha256:4769d471f8ddc3341193ecc5d6560fa44cf8cd0abfabf21af4e195cc0c224072 \
+    --hash=sha256:55ab9837ed97fd7fcc5c131d52fcc2223bc5c6b8a1488bbf7c0e27f1f0023a79
 pyre2-updated==0.3.8 ; python_version >= "3.10" and python_version < "4.0" \
     --hash=sha256:2bda9bf4d59568152e085450ffc1c08fcf659000d06766861f7ff340ba601c3e \
     --hash=sha256:350be9580700b67af87f5227453d1123bc9f4513f0bcc60450574f1bc46cb24f \