build(deps): bump pycryptodome from 3.20.0 to 3.21.0 in /terraform/src

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] <[email protected]>

terraform/src/requirements.txt

@@ -1,3 +1,3 @@
 boto3==1.35.31
-pycryptodome==3.20.0
+pycryptodome==3.21.0
 crypto==1.4.1