fix(generic): remove .html from template_name_suffix

In SelectMergeOrEnrich view, ".html" extension is removed from
the template_name_suffix, to avoid  `TemplateDoesNotExist` error
as it tries to find templates ending with `_selectmergeorenrich.html.html`

apis_core/generic/views.py

@@ -366,7 +366,7 @@ class SelectMergeOrEnrich(GenericModelMixin, PermissionRequiredMixin, FormView):
     external sources, if set up) and on form submit redirects to the Enrich view.
     """
 
-    template_name_suffix = "_selectmergeorenrich.html"
+    template_name_suffix = "_selectmergeorenrich"
     permission_action_required = "create"
     form_class = GenericSelectMergeOrEnrichForm