Fix broken poetry install

[Fiete (FieteO)]

On my machine, I cannot run poetry install to install the dependencies of the project:

$ poetry install
...
Package operations: 63 installs, 0 updates, 0 removals

  - Installing triton (2.1.0): Failed

    | Unable to find installation candidates for triton (2.1.0)
    | 
    | This is likely not a Poetry issue.
    | 
    |   - 8 candidate(s) were identified for the package
    |   - 8 wheel(s) were skipped as your project's environment does not support the identified abi tags
    | 
    | Solutions:
    | Make sure the lockfile is up-to-date. You can try one of the following;
    | 
    |     1. Regenerate lockfile: poetry lock --no-cache --regenerate
    |     2. Update package     : poetry update --no-cache triton
    | 
    | If neither works, please first check to verify that the triton has published wheels available from your configured source that are compatible with your environment- ie. operating system, architecture (x86_64, arm64 etc.), python interpreter.

This PR

• updates the lock file with the result of running poetry lock --no-cache --regenerate
• replaces deprecated imports that are not in langchain_community