Fix #957 (#958)

* Fix #957

Fixes: #957

* Use Typescript notation

* Fix linting as suggested

Author: reisingerf

lib/workload/stateless/stacks/bclconvert-manager/deploy/stack.ts

@@ -104,6 +104,7 @@ export class BclConvertManagerStack extends Stack {
         ICAV2_ACCESS_TOKEN_SECRET_ID: icav2JwtSecretsManagerObj.secretName,
       },
       architecture: Architecture.ARM_64,
+      reservedConcurrentExecutions: 1,
     });
 
     dynamoDBTable.grantReadWriteData(EventTranslatorFunction);