fix: add id attr to liaisons ButtonWidget (ietf-tools#10389)

Author: jennifer-richards

ietf/liaisons/widgets.py

@@ -26,7 +26,9 @@ def render(self, name, value, **kwargs):
                 html += '<span class="d-none attachRequiredField">%s</span>' % conditional_escape(i)
             required_str = 'Please fill in %s to attach a new file' % conditional_escape(self.required_label)
             html += '<span class="d-none attachDisabledLabel">%s</span>' % conditional_escape(required_str)
-        html += '<button type="button" class="addAttachmentWidget btn btn-primary btn-sm">%s</button>' % conditional_escape(self.label)
+        html += '<button type="button" id="{}" class="addAttachmentWidget btn btn-primary btn-sm">{}</button>'.format(
+            f"id_{name}", conditional_escape(self.label)
+        )
         return mark_safe(html)