Update protos/sigstore_rekor.proto

Co-authored-by: Hayden B <[email protected]>
Signed-off-by: Appu <[email protected]>

protos/sigstore_rekor.proto

@@ -36,7 +36,7 @@ message KindVersion {
 
 // The checkpoint must contain a signature of the tree head (root hash),
 // size of the tree and the transparency log's unique identifier (log ID).
-// It may also be followed by any optional data.The result is a string, 
+// It MAY also be followed by any optional data. The result is a string, 
 // the format is described here https://github.com/transparency-dev/formats/blob/main/log/README.md
 // The details are here https://github.com/sigstore/rekor/blob/a6e58f72b6b18cc06cefe61808efd562b9726330/pkg/util/signed_note.go#L114
 // The signature has the same format as