add Github Star History Chart

Author: junjie.miao

README.md

@@ -113,3 +113,14 @@ Scripting tool for downloading Dify plugin package from Dify Marketplace and Git
 
 Github Repo: https://github.com/junjiem/dify-plugin-repackaging
 
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+---
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+### Star history
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+[![Star History Chart](https://api.star-history.com/svg?repos=junjiem/dify-plugin-tools-dbquery&type=Date)](https://star-history.com/#junjiem/dify-plugin-tools-dbquery&Date)
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