Fix newline at end of file in collection-index.yml

Author: abdurriq

_data/collection-index.yml

@@ -1370,4 +1370,4 @@
   maintainer: OpenTechIL
   contact: https://github.com/OpenTechIL/offline-python-vscode-devcontainer/issues
   repository: https://github.com/OpenTechIL/offline-python-vscode-devcontainer
-  ociReference: ghcr.io/opentechil/offline-python-vscode-devcontainer
+  ociReference: ghcr.io/opentechil/offline-python-vscode-devcontainer