Change commit-msg hook.sh address to right place (#21343)

Since hook.sh address has moved from

`https://cdn.rawgit.com/tommarshall/git-good-commit/v0.6.1/hook.sh`

to

`https://cdn.jsdelivr.net/gh/tommarshall/git-good-commit@v0.6.1/hook.sh`

fix the address to the moved address.

Signed-off-by: yuzhipeng <yuzp1996@gmail.com>

CONTRIBUTING.md

@@ -312,7 +312,7 @@ The commit message should follow the convention on [How to Write a Git Commit Me
 To help write conformant commit messages, it is recommended to set up the [git-good-commit](https://github.com/tommarshall/git-good-commit) commit hook. Run this command in the Harbor repo's root directory:
 
 ```sh
-curl https://cdn.rawgit.com/tommarshall/git-good-commit/v0.6.1/hook.sh > .git/hooks/commit-msg && chmod +x .git/hooks/commit-msg
+curl https://cdn.jsdelivr.net/gh/tommarshall/git-good-commit@v0.6.1/hook.sh > .git/hooks/commit-msg && chmod +x .git/hooks/commit-msg
 ```
 
 ### Automated Testing