chore(deps): sync dependencies between Pipfile and requirements.txt

We're still using 'pipenv' to determine conflict-free sets of
dependencies, but install them via (plain) 'pip'. Hence we should
make sure the `requirements.txt` files match the versions 'pipenv'
found.

  $ cd application/
  $ pipenv sync
  $ pipenv run pip freeze > requirements.txt
  $ cp -a requirements.txt ../deployment/roles/briefkasten/files/

Refs: #387, e880fb0, 099ecb1, 4df8d86, ZO-6184

application/requirements.txt

@@ -9,6 +9,7 @@ hupper==1.12.1
 iso8601==2.1.0
 itsdangerous==2.2.0
 Jinja2==3.1.5
+legacy-cgi==2.6.1
 lxml==5.3.0
 MarkupSafe==3.0.2
 Paste==3.10.1
@@ -20,7 +21,7 @@ pyramid-chameleon==0.3
 python-gnupg==0.5.4
 PyYAML==6.0.2
 repoze.xmliter==0.6.1
-six==1.17.0
+setuptools==75.8.0
 translationstring==1.4
 venusian==3.1.1
 watchdog==6.0.0

deployment/roles/briefkasten/files/requirements.txt

@@ -9,6 +9,7 @@ hupper==1.12.1
 iso8601==2.1.0
 itsdangerous==2.2.0
 Jinja2==3.1.5
+legacy-cgi==2.6.1
 lxml==5.3.0
 MarkupSafe==3.0.2
 Paste==3.10.1
@@ -20,7 +21,7 @@ pyramid-chameleon==0.3
 python-gnupg==0.5.4
 PyYAML==6.0.2
 repoze.xmliter==0.6.1
-six==1.17.0
+setuptools==75.8.0
 translationstring==1.4
 venusian==3.1.1
 watchdog==6.0.0