Fix a warning about dash-separated cfg key

felixonmars · web-flow · commit bc38119d43a6 · 2022-05-10T12:09:58.000+08:00
```
/usr/lib/python3.10/site-packages/setuptools/dist.py:723: UserWarning: Usage of dash-separated 'description-file' will not be supported in future versions. Please use the underscore name 'description_file' instead
```
diff --git a/setup.cfg b/setup.cfg
@@ -1,3 +1,3 @@
 
 [metadata]
-description-file = README.rst
+description_file = README.rst

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,3 @@`
`1`	`1`
`2`	`2`	`[metadata]`
`3`		`-description-file = README.rst`
	`3`	`+description_file = README.rst`