chore(rivetkit): update RIVETKIT_* env var names to RIVET_*#3839

NathanFlurry wants to merge 1 commit into01-12-doc_default_to_serverless_pairivet-dev/rivet:01-12-doc_default_to_serverless_paifrom

01-12-chore_rivetkit_update_rivetkit__env_var_names_to_rivet__rivet-dev/rivet:01-12-chore_rivetkit_update_rivetkit__env_var_names_to_rivet__Copy head branch name to clipboard