chore(ci): fix gh script syntax error (#103)

.github/workflows/chart-releaser.yaml

@@ -70,7 +70,7 @@ jobs:
                 const { data: file } = await github.rest.repos.getContent({
                   owner: context.repo.owner,
                   repo: context.repo.repo,
-                  path: 'index.yaml'
+                  path: 'index.yaml',
                   ref: 'main'
                 });
                 fileSha = file.sha;