Release 3.11.16 (#10679)

<img width="700" alt="Screenshot 2025-04-01 at 1 42 52 PM"
src="https://github.com/user-attachments/assets/5ec2c6b3-389f-417d-8bed-369f7a2fefda"
/>

Author: bdraco

CHANGES.rst

@@ -10,6 +10,33 @@
 
 .. towncrier release notes start
 
+3.11.16 (2025-04-01)
+====================
+
+Bug fixes
+---------
+
+- Replaced deprecated ``asyncio.iscoroutinefunction`` with its counterpart from ``inspect``
+  -- by :user:`layday`.
+
+
+  *Related issues and pull requests on GitHub:*
+  :issue:`10634`.
+
+
+
+- Fixed :class:`multidict.CIMultiDict` being mutated when passed to :class:`aiohttp.web.Response` -- by :user:`bdraco`.
+
+
+  *Related issues and pull requests on GitHub:*
+  :issue:`10672`.
+
+
+
+
+----
+
+
 3.11.15 (2025-03-31)
 ====================
 

CHANGES/10634.bugfix.rst

@@ -1,4 +1,4 @@
-__version__ = "3.11.16.dev0"
+__version__ = "3.11.16"
 
 from typing import TYPE_CHECKING, Tuple