fix: correct YAML syntax in build-docker-compose.yaml

[gounthar]

Summary

Fixes YAML parsing errors in both docker-compose.yaml and build-docker-compose.yaml that were preventing updatecli from processing these files.

Changes

• Added missing environment: key before CASC_RELOAD_TOKEN variable in jenkins_controller service in both files:
  • build-docker-compose.yaml (line 48)
  • docker-compose.yaml (line 68)

Problem

The YAML parser was failing with:

[48:7] value is not allowed in this context
  > 48 |       - CASC_RELOAD_TOKEN=thisisnotsecure

And:

[68:7] value is not allowed in this context
  > 68 |       - CASC_RELOAD_TOKEN=thisisnotsecure

This occurred because the environment variables were defined without the required environment: key.

Impact

• Resolves updatecli workflow failures on weekly branch
• Unblocks other PRs that depend on clean updatecli runs
• Ensures Docker Compose files are valid YAML

Testing

• Validated YAML syntax is correct in both files
• updatecli should now be able to parse and process these files successfully