docs: Standardize DashScopeEmbeddings docstring #33625

Job	Run time
build	11s
cd libs/community / make extended_tests #3.9	3m 24s
cd libs/community / make extended_tests #3.11	1m 28s
test-doc-imports	0s
cd libs/community / poetry run pytest -m compile tests/integration_tests #3.11	39s
cd libs/community / poetry run pytest -m compile tests/integration_tests #3.9	42s
cd libs/community / make lint #3.13	50s
cd libs/community / make lint #3.9	44s
cd libs/community / make test #3.13	1m 2s
cd libs/community / make test #3.9	1m 4s
cd libs/community / make test # pydantic: ~=2.7.0, python: 3.11,	42s
cd libs/community / make test # pydantic: ~=2.8.0, python: 3.11,	41s
cd libs/community / make test # pydantic: ~=2.9.0, python: 3.11,	39s
CI Success	1s
	12m 7s

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