Bump pycryptodome from 3.20.0 to 3.21.0

Bumps [pycryptodome](https://github.com/Legrandin/pycryptodome) from 3.20.0 to 3.21.0.
- [Release notes](https://github.com/Legrandin/pycryptodome/releases)
- [Changelog](https://github.com/Legrandin/pycryptodome/blob/master/Changelog.rst)
- [Commits](Legrandin/pycryptodome@v3.20.0...v3.21.0)

---
updated-dependencies:
- dependency-name: pycryptodome
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Pipfile

@@ -32,7 +32,7 @@ jwcrypto = "==1.5.6"
 newrelic = "==10.0.0"
 pillow = "==10.4.0"
 psycopg = { extras = ["c"], version = "==3.2.2" }
-pycryptodome = "==3.20.0"
+pycryptodome = "==3.21.0"
 pydantic = "==1.10.18" # fix for fhir.resources < 7.0.2
 pyjwt = "==2.9.0"
 python-slugify = "==8.0.4"