⬆️ Updates PyNaCl to v1.6.2 [SECURITY]

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docs/requirements_frozen.txt

@@ -61,7 +61,7 @@ poyo==0.5.0
 pycparser==2.21
 PyGithub==1.55
 PyJWT==2.3.0
-PyNaCl==1.5.0
+PyNaCl==1.6.2
 pyparsing==3.0.8
 python-dateutil==2.8.2
 python-mpd2==3.0.5