Merge branch '6.1' into 6.2

* 6.1:
  Update bootstrap_5_layout.html.twig
  [HttpClient] Fix seeking in not-yet-initialized requests
  [Serializer] Allow getting discriminated type by class name

Author: nicolas-grekas

Resources/views/Form/bootstrap_5_layout.html.twig

@@ -218,10 +218,10 @@
     {%- set attr = attr|merge({class: attr_class|trim}) -%}
     {%- set parent_label_class = parent_label_class|default(label_attr.class|default('')) -%}
     {%- if 'checkbox-inline' in parent_label_class %}
-        {% set row_class = row_class ~ ' form-check-inline' %}
+        {%- set row_class = row_class ~ ' form-check-inline' -%}
     {% endif -%}
     {%- if 'checkbox-switch' in parent_label_class %}
-        {% set row_class = row_class ~ ' form-switch' %}
+        {%- set row_class = row_class ~ ' form-switch' -%}
     {% endif -%}
     {%- if row_class is not empty -%}
         <div class="{{ row_class }}">