Update collection-index.yml

Author: prplecake

_data/collection-index.yml

@@ -992,3 +992,8 @@
   contact: https://github.com/RouL/devcontainer-features/issues
   repository: https://github.com/RouL/devcontainer-features
   ociReference: ghcr.io/roul/devcontainer-features
+- name: devcontainer features by prplecake
+  maintainer: Matthew Jorgensen (prplecake)
+  contact: https://github.com/prplecake/devcontainer-features/issues
+  repository: https://github.com/prplecake/devcontainer-features
+  ociReference: ghcr.io/prplecake/devcontainer-features