chore: add missing line to grafeas header (googleapis#13585)

Fixes googleapis/librarian#6549

Author: sofisl

java-grafeas/license-header.txt

@@ -12,4 +12,5 @@
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
- */
+ */
+ 

java-grafeas/src/main/java/io/grafeas/v1/AliasContext.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // NO CHECKED-IN PROTOBUF GENCODE
 // source: grafeas/v1/provenance.proto

java-grafeas/src/main/java/io/grafeas/v1/AliasContextOrBuilder.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // NO CHECKED-IN PROTOBUF GENCODE
 // source: grafeas/v1/provenance.proto

java-grafeas/src/main/java/io/grafeas/v1/Architecture.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // NO CHECKED-IN PROTOBUF GENCODE
 // source: grafeas/v1/package.proto

java-grafeas/src/main/java/io/grafeas/v1/Artifact.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // NO CHECKED-IN PROTOBUF GENCODE
 // source: grafeas/v1/provenance.proto

java-grafeas/src/main/java/io/grafeas/v1/ArtifactOrBuilder.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // NO CHECKED-IN PROTOBUF GENCODE
 // source: grafeas/v1/provenance.proto

java-grafeas/src/main/java/io/grafeas/v1/Attestation.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // NO CHECKED-IN PROTOBUF GENCODE
 // source: grafeas/v1/attestation.proto

java-grafeas/src/main/java/io/grafeas/v1/AttestationNote.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // NO CHECKED-IN PROTOBUF GENCODE
 // source: grafeas/v1/attestation.proto

java-grafeas/src/main/java/io/grafeas/v1/AttestationNoteOrBuilder.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // NO CHECKED-IN PROTOBUF GENCODE
 // source: grafeas/v1/attestation.proto

java-grafeas/src/main/java/io/grafeas/v1/AttestationOccurrence.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // NO CHECKED-IN PROTOBUF GENCODE
 // source: grafeas/v1/attestation.proto