fix: boolean env var type issue (older compose version)

[wrn14897]

for docker-vompose v1x, it throws error like:

ERROR: The Compose file './docker-compose.yml' is invalid because:
services.ingestor.environment.VECTOR_OPENSSL_LEGACY_PROVIDER contains false, which is an invalid type, it should be a string, number, or a null

[changeset-bot]

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