Update Django version to 5.2.16 (#15602)

closes #15596

Author: Maffooch

requirements.txt

@@ -20,7 +20,7 @@ django-slack==5.19.0
 django-watson==1.6.3
 django-permissions-policy==4.32.0
 django-prometheus==2.5.0
-Django==5.2.15
+Django==5.2.16
 django-single-session==0.2.0
 djangorestframework==3.17.1
 html2text==2025.4.15