Loosen dependencies requirements

[Zaczero]

Describe the bug
Because of strict dependency pins, it's not possible to easily install new versions of packages, which contain new features, bug, and security fixes. Please choose a more sensible version selection schema than ==.

Related files:
https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/blob/main/stac_fastapi/core/setup.py

Possibly related files:
https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/blob/main/stac_fastapi/elasticsearch/setup.py
(the 8.11.0 is suspicious here too)

There was a similar discussion on pgstac repo:
stac-utils/pgstac#341

Because of that packages like pydantic-core install 2.18.4 where newest is 2.29.0.