bump actions/attest from v2.1.0 to v2.2.0 (#148)

Includes support for new subject-checksums input parameter

Signed-off-by: Brian DeHamer <bdehamer@github.com>

add attestation-id and attestation-url outputs (#137)

Signed-off-by: Brian DeHamer <bdehamer@github.com>

bump actions/attest from 2.0.0 to 2.0.1 (#133)

Signed-off-by: Brian DeHamer <bdehamer@github.com>

bump actions/attest to v2.0.0 (#126)

Signed-off-by: Brian DeHamer <bdehamer@github.com>

bump actions/attest from 1.4.0 to 1.4.1 (#98)

Signed-off-by: Brian DeHamer <bdehamer@github.com>

bump actions/attest from 1.3.3 to 1.4.0 (#85)

Signed-off-by: Brian DeHamer <bdehamer@github.com>

bump actions/attest from 1.3.2 to 1.3.3 (#80)

Signed-off-by: Brian DeHamer <bdehamer@github.com>

bump actions/attest from 1.3.1 to 1.3.2 (#75)

Signed-off-by: Brian DeHamer <bdehamer@github.com>