Loosen OpenTelemetry dependency version constraint

[janhicken]

When using the datacontract-cli as a library dependency, OpenTelemetry may well be already a dependency of the dependee. The previous dependency constraint allowed only other patch versions of OpenTelemetry to be used. However, other minor versions should also be compatible as of OpenTelemetry's stability guarantees.

As such, the dependency constraints for the OpenTelemetry OTLP exporters have been loosened to allow minor version upgrades.