Update collection-index.yml to include fexec

Author: roboslone

_data/collection-index.yml

@@ -1082,3 +1082,8 @@
   contact: https://github.com/RyanLua/templates/issues
   repository: https://github.com/RyanLua/templates
   ociReference: ghcr.io/ryanlua/templates/roblox
+- name: fexec
+  maintainer: roboslone
+  contact: https://github.com/roboslone/go-framework/issues
+  repository: https://github.com/roboslone/go-framework
+  ociReference: ghcr.io/roboslone/go-framework/fexec