docs: SPDX expression examplefor LicenseRef-

Signed-off-by: Jan Kowalleck <[email protected]>

Author: jkowalleck

schema/bom-1.7.proto

@@ -427,6 +427,7 @@ message ExpressionDetailed {
     // Example values:
     // - "Apache-2.0",
     // - "GPL-3.0-only WITH Classpath-exception-2.0"
+    // - "LicenseRef-my-custom-license"
     string license_identifier = 1;
     // Specifies the optional full text of the attachment
     optional AttachedText text = 2;

schema/bom-1.7.schema.json

@@ -1509,7 +1509,8 @@
                       "type": "string",
                       "examples": [
                         "Apache-2.0",
-                        "GPL-3.0-only WITH Classpath-exception-2.0"
+                        "GPL-3.0-only WITH Classpath-exception-2.0",
+                        "LicenseRef-my-custom-license"
                       ]
                     },
                     "text": {

schema/bom-1.7.xsd

@@ -1019,8 +1019,9 @@ limitations under the License.
                                 A valid SPDX license identifier. Refer to https://spdx.org/specifications for syntax requirements.
 
                                 Example values:
-                                - Apache-2.0"
+                                - Apache-2.0
                                 - GPL-3.0-only WITH Classpath-exception-2.0
+                                - LicenseRef-my-custom-license
                             </xs:documentation>
                         </xs:annotation>
                     </xs:attribute>