Update pycryptodome requirement from ==3.20.* to ==3.21.* (#4504)

Updates the requirements on [pycryptodome](https://github.com/Legrandin/pycryptodome) to permit the latest version.
- [Release notes](https://github.com/Legrandin/pycryptodome/releases)
- [Changelog](https://github.com/Legrandin/pycryptodome/blob/master/Changelog.rst)
- [Commits](https://github.com/Legrandin/pycryptodome/compare/v3.20.0x...v3.21.0)

---
updated-dependencies:
- dependency-name: pycryptodome
  dependency-type: direct:production
...

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pyproject.toml

@@ -80,7 +80,7 @@ dependencies = [
   "psycopg2-binary",
   "pycountry",
   "pycparser==2.22",
-  "pycryptodome==3.20.*",
+  "pycryptodome==3.21.*",
   "pypdf==5.0.*",
   "python-bidi==0.6.*",  # Support for Arabic in reportlab
   "python-dateutil==2.9.*",