base: refreeze requirements.txt

Author: jupyterhub-bot

base/requirements.txt

@@ -46,7 +46,7 @@ jsonschema-specifications==2024.10.1
     # via jsonschema
 jupyter-events==0.12.0
     # via jupyterhub
-jupyterhub==5.3.0rc0
+jupyterhub==5.3.0
     # via -r requirements.in
 mako==1.3.10
     # via alembic