Add cross-links between container singletons and reset container singletons docs pages

docs/containers/reset_singletons.rst

@@ -1,3 +1,5 @@
+.. _reset-container-singletons:
+
 Reset container singletons
 --------------------------
 
@@ -16,4 +18,6 @@ Method ``.reset_singletons()`` also resets singletons in sub-containers: ``provi
    :lines: 3-
    :emphasize-lines: 21
 
+See also: :ref:`singleton-provider`.
+
 .. disqus::

docs/main/changelog.rst

@@ -13,6 +13,8 @@ Development version
   are defined.
   See issue: `#383 <https://github.com/ets-labs/python-dependency-injector/issues/383>`_.
   Thanks to `@shaunc <https://github.com/shaunc>`_ for suggesting the feature.
+- Add docs cross-links between ``Singleton`` provider and "Reset container singletons"
+  pages.
 
 4.21.0
 ------

docs/providers/singleton.rst

@@ -1,3 +1,5 @@
+.. _singleton-provider:
+
 Singleton provider
 ==================
 
@@ -62,6 +64,8 @@ call ``.full_reset()`` method.
    :lines: 3-
    :emphasize-lines: 25
 
+See also: :ref:`reset-container-singletons`.
+
 Using singleton with multiple threads
 -------------------------------------