docs: Fix typo in CHANGELOG (#211)

Signed-off-by: Xuanwo <[email protected]>

Author: Xuanwo

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [v0.4.0] - 2022-04-02
 
-**Refer to [./docs/upgrade.md] `From v0.3 to v0.4` section for more upgrade details.**
+**Refer to [Upgrade](./docs/upgrade.md) `From v0.3 to v0.4` section for more upgrade details.**
 
 ### Added