bug: ensure sarif and scorecard packages are imported

The two newly added attestors were not imported so their init functions
would not have run. Also the scorecard attestor had references to sarif
incorrectly.

Signed-off-by: Mikhail Swift <mikhail@testifysec.com>

pkg/attestation/scorecard/scorecard.go

@@ -108,7 +108,7 @@ func (a *Attestor) getCanidate(ctx *attestation.AttestationContext) error {
 			return fmt.Errorf("error reading file: %s", path)
 		}
 
-		//check to see if we can unmarshal into sarif type
+		//check to see if we can unmarshal into scorecard type
 		if err := json.Unmarshal(reportBytes, &a.Scorecard); err != nil {
 			fmt.Printf("error unmarshaling report: %s\n", err)
 			continue
@@ -119,7 +119,7 @@ func (a *Attestor) getCanidate(ctx *attestation.AttestationContext) error {
 
 		return nil
 	}
-	return fmt.Errorf("no sarif file found")
+	return fmt.Errorf("no scorecard file found")
 }
 
 func (a *Attestor) Subjects() map[string]cryptoutil.DigestSet {

pkg/attestors.go

@@ -25,4 +25,6 @@ import (
 	_ "github.com/testifysec/witness/pkg/attestation/jwt"
 	_ "github.com/testifysec/witness/pkg/attestation/maven"
 	_ "github.com/testifysec/witness/pkg/attestation/oci"
+	_ "github.com/testifysec/witness/pkg/attestation/sarif"
+	_ "github.com/testifysec/witness/pkg/attestation/scorecard"
 )