fix doc build failed.

nightsailer · nightsailer · commit 6ed8110e76c9 · 2025-06-21T16:24:40.000+08:00
diff --git a/docs/source/api.rst b/docs/source/api.rst
@@ -8,7 +8,9 @@ Structs
 
 .. autoclass:: Struct
 
-.. autoclass:: StructMeta
+**StructMeta**
+
+The metaclass for Struct types. This class can be subclassed to create custom struct behaviors. See :ref:`struct-meta-subclasses` for detailed information on using StructMeta subclasses.
 
 .. autofunction:: field
 
diff --git a/docs/source/index.rst b/docs/source/index.rst
@@ -1,5 +1,5 @@
 msgspec-x
-=======
+=========
 
 ``msgspec-x`` is a community-driven fork of the original msgspec library. It provides two namespaces:
 - ``msgspec``: 100% compatible with the original API for drop-in replacement.
diff --git a/docs/source/structs.rst b/docs/source/structs.rst
@@ -1002,7 +1002,7 @@ collected (leading to a memory leak).
 .. _struct-meta-subclasses:
 
 StructMeta Subclasses (Advanced)
--------------------------------
+---------------------------------
 
 .. versionadded:: 0.20.0
 
