Add Phoenix entry to collection index

Author: Lwrless

_data/collection-index.yml

@@ -1396,3 +1396,8 @@
   contact: https://github.com/LDlornd/uv-dev-container/issues
   repository: https://github.com/LDlornd/uv-dev-container
   ociReference: ghcr.io/LDlornd/uv-dev-container/lornd-uv
+- name: Phoenix
+  maintainer: lwrless
+  contact: https://github.com/on-my-machine-works/devcontainer-templates/issues
+  repository: https://github.com/on-my-machine-works/devcontainer-templates
+  ociReference: ghcr.io/on-my-machine-works/devcontainer-templates/phoenix