Update collection-index.yml (#430)

Author: matheusfvesco

_data/collection-index.yml

@@ -833,4 +833,9 @@
   contact: https://github.com/tcaky/devcontainer-features/issues
   repository: https://github.com/tcaky/devcontainer-features
   ociReference: ghcr.io/tcaky/devcontainer-features
+- name: Dev Container Templates by matheusfvesco
+  maintainer: matheusfvesco
+  contact: https://github.com/matheusfvesco/devcontainer-templates/issues
+  repository: https://github.com/matheusfvesco/devcontainer-templates
+  ociReference: ghcr.io/matheusfvesco/devcontainer-templates