Update lambda_build.yml

Author: m-messer

.github/workflows/lambda_build.yml

@@ -53,6 +53,9 @@ on:
       build-secrets:
         description: "The Docker secrets to use for the build"
         required: false
+      LICENSE:
+        description: "The licence file to bundle into the ECR image"
+        required: false
     outputs:
       registry:
         description: "The registry where the image was pushed"