add knowhere submodule back

Former-commit-id: 3da9baeac0ae5e163879f2adaacce5adad4f1f65

add knowhere submodule back
Former-commit-id: 3da9baeac0ae5e163879f2adaacce5adad4f1f65
87226f5e · Yu Kun · 41f723b1 · 6a4f242e
隐藏空白更改
内联并排

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cpp/thirdparty/knowhere cpp/thirdparty/knowhere +1 -0

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--- a/knowhere @ 6a4f242e
+++ b/knowhere @ 6a4f242e
+Subproject commit 6a4f242ec40c539f1e6d9a7305282f7ff03c19d2