[FIX] website: restore default checked value for form radio buttons

Same fix as for checkbox (commit [1]) and select (commit [2]).
The radio buttons were forgotten.

Check commit [1] for in-depth explanation, but this is basically because
since the qweb engine conversion to OWL (done at [3]), it would toggle
the internal `checked` value and not the `checked` attribute anymore.

[1]: odoo@b42e9cc
[2]: odoo@dd50481
[3]: odoo#130467

opw-3755078

closes odoo#156818

X-original-commit: d683947
Signed-off-by: Robin Lejeune (role) <role@odoo.com>

addons/website/static/src/xml/website_form_editor.xml

@@ -228,7 +228,7 @@
                     value="Yes"
                     class="s_website_form_input form-check-input"
                     t-att-name="field.name"
-                    t-att-checked="field.value and 'checked' or None"
+                    t-att="{checked: field.value and 'checked' or None}"
                     t-att-required="field.required || field.modelRequired || None"
                     t-att-id="field.id"
                 />
@@ -267,7 +267,7 @@
                     class="s_website_form_input form-check-input"
                     t-att-id="recordId"
                     t-att-name="field.name"
-                    t-att-checked="record.selected and 'checked' or None"
+                    t-att="{checked: record.selected and 'checked' or None}"
                     t-att-value="record.id"
                     t-att-required="field.required || field.modelRequired || None"
                 />