Revert the gpg-passphrase input default back to GPG_PASSPHRASE so existing v5
workflows that set the GPG_PASSPHRASE environment variable keep working without
changes. setup-java writes gpg.passphraseEnvName=GPG_PASSPHRASE into an active
profile, so the maven-gpg-plugin reads the same variable as before.
The only remaining compatibility requirement is maven-gpg-plugin 3.2.0+, which
is documented in the README and advanced usage guide.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 7d0a510e-aebf-4ec4-a667-efeb3e4edeb1
0d4af386ec