chore: bump schema versions for upcoming changes

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

Author: jkowalleck

schema/bom-1.5.proto

@@ -1,5 +1,5 @@
 syntax = "proto3";
-package cyclonedx.v1_5;
+package cyclonedx.v1_5; // 1.5.1
 import "google/protobuf/timestamp.proto";
 
 // Specifies attributes of the text

schema/bom-1.5.xsd

@@ -22,7 +22,7 @@ limitations under the License.
            targetNamespace="http://cyclonedx.org/schema/bom/1.5"
            vc:minVersion="1.0"
            vc:maxVersion="1.1"
-           version="1.5.0">
+           version="1.5.1">
 
     <xs:import namespace="http://cyclonedx.org/schema/spdx" schemaLocation="http://cyclonedx.org/schema/spdx"/>