Update collection-index.yml (devcontainers#481)

Author: rhiroe

_data/collection-index.yml

@@ -947,3 +947,8 @@
   contact: https://bas.bio
   repository: https://github.com/sebst/devcontainer-features
   ociReference: ghcr.io/sebst/devcontainer-features
+- name: devcontainer features by rhiroe
+  maintainer: rhiroe
+  contact: https://github.com/rhiroe/features/issues
+  repository: https://github.com/rhiroe/features
+  ociReference: ghcr.io/rhiroe/features