build(deps): bump pynacl

Bumps [pynacl](https://github.com/pyca/pynacl) from 1.5.0 to 1.6.2.
- [Changelog](https://github.com/pyca/pynacl/blob/main/CHANGELOG.rst)
- [Commits](pyca/pynacl@1.5.0...1.6.2)

---
updated-dependencies:
- dependency-name: pynacl
  dependency-version: 1.6.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

layers/layer2_python3/0500_extra_python_packages/requirements3.txt

@@ -94,7 +94,7 @@ pydantic==2.12.4
 pydantic-core==2.41.5
 Pygments==2.19.2
 pyinotify==0.9.6
-PyNaCl==1.5.0
+PyNaCl==1.6.2
 python-dateutil==2.9.0.post0
 python-ldap==3.4.5
 pytz==2025.1