Update BMSAPI.postman_collection.json

[shielanunez]

List of Changes:

1. Adjust index for assertion of one method in ontology-get-services

Tasks	✅ / ❌
Pre-merging
Followed basic standards	✅
Ensured that the List of API Services spreadsheet is updated	N/A
Ensured that all test data created and used in the tests are added in the Setting up Initial Data (Data Seeding) page
Ensured that the entire test suite is passing in branch using PostmanCollections-CIRun or PostmanCollections-PerfTests (if changes are related to performance test) jenkins jobs	✅https://ci.ibp.services/job/PostmanCollections-CIRun/81/console
Ensured that Zephyr Scale test cases are updated	N/A
Created backup of the current test data	✅
Post-merging
Ensured that the entire test suite is passing in master using PostmanCollections-CIRun and PostmanCollections-PerfTests (if changes are related to performance test) jenkins jobs
Deleted branch