treat do_lower_case in the same way as the sentence-transformers library (#11815)

Signed-off-by: Max de Bayser <mbayser@br.ibm.com>

tests/models/embedding/language/test_embedding.py

@@ -15,6 +15,7 @@ from ..utils import check_embeddings_close
         # [Encoder-only]
         pytest.param("BAAI/bge-base-en-v1.5",
                      marks=[pytest.mark.core_model, pytest.mark.cpu_model]),
+        pytest.param("sentence-transformers/all-MiniLM-L12-v2"),
         pytest.param("intfloat/multilingual-e5-large"),
         # [Encoder-decoder]
         pytest.param("intfloat/e5-mistral-7b-instruct",