chore: update release.toml (#134)

Author: koushiro

release.toml

@@ -1,7 +1,7 @@
 # NOTE: This repo is not a Cargo workspace; cargo-release won't auto-read this file
 # unless you pass it explicitly. Before releasing, confirm config like below:
 # `cargo release config --manifest-path bip0039/Cargo.toml -c release.toml`
-push-remote = "upstream"
+push-remote = "origin"
 allow-branch = ["main"]
 consolidate-commits = false
 pre-release-commit-message = "chore: release {{crate_name}}-v{{version}}"