Merge branch '5.1' into 5.2

* 5.1:
  Remove experimental mention in lowest branch

Author: OskarStark

components/uid.rst

@@ -10,8 +10,7 @@ The UID Component
 
 .. versionadded:: 5.1
 
-    The UID component was introduced in Symfony 5.1 as an
-    :doc:`experimental feature </contributing/code/experimental>`.
+    The UID component was introduced in Symfony 5.1.
 
 Installation
 ------------