fix: specify embedding retriever version

[laffeychris]

Related Issues

• fixes Cannot specify model version for SentenceTransformer embedding retriever #7810

Proposed Changes:

How did you test it?

Manual testing locally.

I would appreciate any pointers to where you might like me to include a test.

Notes for the reviewer

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• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.
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[shadeMe]

Thanks for the PR! Could you add a release note briefly describing the change?

[sjrl]

Hey @laffeychris thanks for the update! Being able to use revision also requires us to be at least using Sentence Transformers version 2.3.1 (actually it's 2.3.0, but let's include the patch version). So could you also update the pyproject.toml here

haystack/pyproject.toml

Line 90 in 0cae52e

"sentence-transformers>=2.2.0", # See haystack/nodes/retriever/_embedding_encoder.py, _SentenceTransformersEmbeddingEncoder

and increase the version to 2.3.1?