docs: fix pkg name in guides-upgrade.md (#3274)

Co-authored-by: 袁野 <[email protected]>

Author: enya

docs/guides-upgrade.md

@@ -39,7 +39,7 @@ If you used `validate-commit-msg` with custom configuration you might want to cu
 
 ```sh
 npm remove validate-commit-msg --save-dev
-npm install --save-dev @commitlint/cli @commitint/config-conventional
+npm install --save-dev @commitlint/cli @commitlint/config-conventional
 ```
 
 **Add a commitmsg run-script to package.json**