build: pin django-autocomplete-light to 4.0.0

4.0.1 was deleted from PyPI on 2026-06-18 when the maintainer released
5.0.0, breaking pip-sync on every CI job (No matching distribution found
for django-autocomplete-light==4.0.1). kernel.in is unconstrained, so a
recompile would jump to the 5.0.0 major release; pin the compiled files
to the still-available 4.0.0 patch to unblock CI without a major upgrade.

Author: Waleed-Mujahid

requirements/edx/base.txt

@@ -252,7 +252,7 @@ django==5.2.15
     #   xss-utils
 django-appconf==1.2.0
     # via django-statici18n
-django-autocomplete-light==4.0.1
+django-autocomplete-light==4.0.0
     # via -r requirements/edx/kernel.in
 django-cache-memoize==0.2.1
     # via edx-enterprise

requirements/edx/development.txt

@@ -423,7 +423,7 @@ django-appconf==1.2.0
     #   -r requirements/edx/doc.txt
     #   -r requirements/edx/testing.txt
     #   django-statici18n
-django-autocomplete-light==4.0.1
+django-autocomplete-light==4.0.0
     # via
     #   -r requirements/edx/doc.txt
     #   -r requirements/edx/testing.txt

requirements/edx/doc.txt

@@ -318,7 +318,7 @@ django-appconf==1.2.0
     # via
     #   -r requirements/edx/base.txt
     #   django-statici18n
-django-autocomplete-light==4.0.1
+django-autocomplete-light==4.0.0
     # via -r requirements/edx/base.txt
 django-cache-memoize==0.2.1
     # via

requirements/edx/testing.txt

@@ -339,7 +339,7 @@ django-appconf==1.2.0
     # via
     #   -r requirements/edx/base.txt
     #   django-statici18n
-django-autocomplete-light==4.0.1
+django-autocomplete-light==4.0.0
     # via -r requirements/edx/base.txt
 django-cache-memoize==0.2.1
     # via