Add anchor

Author: Drino

docs/source/libraries.rst

@@ -453,6 +453,8 @@ specified only by name, use the keyword-only separator (``*``).
    def create_user(age: int, *, dob: Optional[date] = None):
        ...
 
+.. _annotating-decorators:
+
 Annotating Decorators
 ---------------------
 
@@ -490,6 +492,8 @@ original signature, thus blinding type checkers and other tools that
 provide signature assistance. As such, library authors are discouraged
 from creating decorators that mutate function signatures in this manner.
 
+.. _aliasing-decorators:
+
 Aliasing Decorators
 -------------------