chore: fix chartmuseum test failure
The pipeline in !326 (merged) is failing due to missing binary for chartmuseum.
This MR changes the path to install from https://github.com/helm/chartmuseum/releases.
Edited by Shinya Maeda
The pipeline in !326 (merged) is failing due to missing binary for chartmuseum.
This MR changes the path to install from https://github.com/helm/chartmuseum/releases.