Update verifiers/internal/gcb/provenance.go

Co-authored-by: asraa <asraa@google.com>
Signed-off-by: laurentsimon <64505099+laurentsimon@users.noreply.github.com>

verifiers/internal/gcb/provenance.go

@@ -422,7 +422,7 @@ func decodeSignature(s string) ([]byte, []error) {
 
 	// If std decoding failed, try URL decoding.
 	// We try both because we encountered decoding failures
-	// during our tests. The DSSE documentation does not prescribes
+	// during our tests. The DSSE documentation does not prescribe
 	// which encoding to use: `Either standard or URL-safe encoding is allowed`.
 	// https://github.com/secure-systems-lab/dsse/blob/27ce241dec575998dee8967c3c76d4edd5d6ee73/envelope.md#standard-json-envelope.
 	rsig, err = base64.URLEncoding.DecodeString(s)