chore(deps): fix requirements.txt versions (ietf-tools#7414)

* not ready for django-stubs==5
 * pin types-pytz to match existing pytz pin

Author: jennifer-richards

requirements.txt

@@ -20,7 +20,7 @@ django-markup>=1.5    # Limited use - need to reconcile against direct use of ma
 django-oidc-provider>=0.8.1    # 0.8 dropped Django 2 support
 django-referrer-policy>=1.0
 django-simple-history>=3.0.0
-django-stubs>=4.2.7    # The django-stubs version used determines the the mypy version indicated below
+django-stubs>=4.2.7,<5    # The django-stubs version used determines the the mypy version indicated below
 django-tastypie>=0.14.5    # Version must be locked in sync with version of Django
 django-vite>=2.0.2,<3
 django-widget-tweaks>=1.4.12
@@ -57,6 +57,7 @@ python-magic==0.4.18    # Versions beyond the yanked .19 and .20 introduce form
 pymemcache>=4.0.0  # for django.core.cache.backends.memcached.PyMemcacheCache
 python-mimeparse>=1.6    # from TastyPie
 pytz==2022.2.1   # Pinned as changes need to be vetted for their effect on Meeting fields
+types-pytz==2022.2.1   # match pytz version
 requests>=2.31.0
 types-requests>=2.27.1
 requests-mock>=1.9.3