Update collection-index.yml to include httpdss's devcontainers-features (devcontainers#558)

Co-authored-by: Álvaro Rausell Guiard <[email protected]>

Author: httpdss

_data/collection-index.yml

@@ -1042,6 +1042,11 @@
   contact: https://github.com/grafana/devcontainer-features/issues
   repository: https://github.com/grafana/devcontainer-features
   ociReference: ghcr.io/grafana/devcontainer-features
+- name: Dev Container Features by httpdss
+  maintainer: httpdss
+  contact: https://github.com/httpdss/devcontainers-features/issues
+  repository: https://github.com/httpdss/devcontainers-features
+  ociReference: ghcr.io/httpdss/devcontainers-features
 - name: Axon Ivy devcontainer template
   maintainer: axonivy
   contact: https://github.com/axonivy/devcontainer-templates/issues