💡 add utils docstring

docs_build/README.rst

@@ -7,4 +7,5 @@ NoneBot Api Reference
   - `nonebot.config <config.html>`_
   - `nonebot.sched <sched.html>`_
   - `nonebot.log <log.html>`_
+  - `nonebot.utils <utils.html>`_
   - `nonebot.exception <exception.html>`_

docs_build/utils.rst

@@ -0,0 +1,11 @@
+---
+contentSidebar: true
+sidebarDepth: 0
+---
+
+NoneBot.utils 模块
+=================
+
+.. automodule:: nonebot.utils
+   :members:
+   :show-inheritance: