Update Changelog and documentation

Author: jdavid

CHANGELOG.rst

@@ -10,6 +10,14 @@
   `#1245 <https://github.com/libgit2/pygit2/pull/1245>`_
   `#1246 <https://github.com/libgit2/pygit2/pull/1246>`_
 
+- New submodule ``init(...)``, ``update(...)`` and ``reload(...)`` functions;
+  new repository ``submodule_cache_all()``, ``submodule_cache_clear()`` and
+  ``submodule_status(...)`` functions
+  `#1248 <https://github.com/libgit2/pygit2/pull/1248>`_
+
+- Type hints for submodule functions in ``Repository``
+  `#1247 <https://github.com/libgit2/pygit2/pull/1247>`_
+
 
 1.13.2 (2023-10-30)
 -------------------------

docs/submodule.rst

@@ -6,17 +6,15 @@ A submodule is a foreign repository that is embedded within a
 dedicated subdirectory of the repositories tree.
 
 .. autoclass:: pygit2.Repository
-   :members: add_submodule, init_submodules, listall_submodules, lookup_submodule, update_submodules
+   :members: add_submodule, init_submodules, listall_submodules,
+             lookup_submodule, update_submodules, submodule_status, submodule_cache_all,
+             submodule_cache_clear
+
    :noindex:
 
 
 The Submodule type
 ====================
 
-.. automethod:: pygit2.Submodule.open
-
-.. autoattribute:: pygit2.Submodule.name
-.. autoattribute:: pygit2.Submodule.path
-.. autoattribute:: pygit2.Submodule.url
-.. autoattribute:: pygit2.Submodule.branch
-.. autoattribute:: pygit2.Submodule.head_id
+.. autoclass:: pygit2.Submodule
+   :members: