Bump pypdf[crypto] from 6.2.0 to 6.4.0 in /requirements/partial (OpenSlides#3217)

Author: dependabot[bot]

requirements/partial/requirements_production.txt

@@ -6,7 +6,7 @@ dacite==1.7.0
 fastjsonschema==2.21.2
 Flask==3.0.3
 gunicorn==23.0.0
-pypdf[crypto]==6.2.0
+pypdf[crypto]==6.4.0
 lxml==5.1.0
 psycopg[c]==3.2.10
 psycopg-pool==3.2.6