Update the test case of pgvector store

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[codecov[bot]]

Codecov Report

Merging #516 (729d62a) into dev (5aa7e1e) will not change coverage. The diff coverage is 100.00%.

Additional details and impacted files

[](https://app.codecov.io/gh/zilliztech/GPTCache/pull/516?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech) ```diff @@ Coverage Diff @@ ## dev #516 +/- ## ======================================= Coverage 94.05% 94.05% ======================================= Files 94 94 Lines 3920 3920 ======================================= Hits 3687 3687 Misses 233 233 ``` | [Files Changed](https://app.codecov.io/gh/zilliztech/GPTCache/pull/516?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech) | Coverage Δ | | |---|---|---| | [gptcache/\_\_init\_\_.py](https://app.codecov.io/gh/zilliztech/GPTCache/pull/516?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech#diff-Z3B0Y2FjaGUvX19pbml0X18ucHk=) | `100.00% <100.00%> (ø)` | |