Update dostrings for .child property

Author: rushter

selectolax/lexbor.pyi

@@ -112,7 +112,10 @@ class LexborNode:
     def mem_id(self) -> int: ...
     @property
     def child(self) -> LexborNode | None:
-        """Alias for the first_child property."""
+        """Alias for the `first_child` property.
+
+        **Deprecated**. Please use `first_child` instead.
+        """
         ...
     @property
     def first_child(self) -> LexborNode | None:

selectolax/lexbor/node.pxi

@@ -41,7 +41,10 @@ cdef class LexborNode:
 
     @property
     def child(self):
-        """Alias for the `first_child` property."""
+        """Alias for the `first_child` property.
+
+        **Deprecated**. Please use `first_child` instead.
+        """
         return self.first_child
 
     @property

selectolax/modest/node.pxi

@@ -397,7 +397,10 @@ cdef class Node:
 
     @property
     def child(self):
-        """Return the child node."""
+        """Alias for the `first_child` property.
+
+        **Deprecated**. Please use `first_child` instead.
+        """
         cdef Node node
         if self.node.child:
             node = Node.new(self.node.child, self.parser)

selectolax/parser.pyi

@@ -203,7 +203,10 @@ class Node:
         ...
     @property
     def child(self) -> Node | None:
-        """Return the child node."""
+        """Alias for the `first_child` property.
+
+        **Deprecated**. Please use `first_child` instead.
+        """
         ...
     @property
     def parent(self) -> Node | None: