Fix YAMLParseError for collection-inde.yml (devcontainers#139)

Author: samruddhikhandale

_data/collection-index.yml

@@ -243,7 +243,7 @@
   contact: https://github.com/ChristopherMacGown/devcontainer-features/issues
   repository: https://github.com/ChristopherMacGown/devcontainer-features
   ociReference: ghcr.io/christophermacgown/devcontainer-features
-  - name: Pwd9000-ML devcontainer templates
+- name: Pwd9000-ML devcontainer templates
   maintainer: Marcel Lupo @Pwd9000-ML
   contact: https://github.com/Pwd9000-ML/devcontainer-templates/issues
   repository: https://github.com/Pwd9000-ML/devcontainer-templates