README: Fixed link to passwordstore.org (#2129)
README: Fixed link to passwordstore.org (#2129)

RELEASE_NOTES=[DOCUMENTATION] Fixed link to passwordstore.org

Signed-off-by: Ivan Pedersen <a15f8b81a160b4eebe5c84e9e3b65c87b9b2f18e@alpe.se>
gopasspw/gopass,gopasspw/gopass