docs: update README.md

Author: yanglbme

README.md

@@ -9,7 +9,6 @@
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-[![gitee](https://badgen.net/badge/gitee/for%20Chinese%20developers/red)](https://gitee.com/doocs/advanced-java)
 [![issues](https://badgen.net/github/open-issues/doocs/advanced-java)](https://github.com/doocs/advanced-java/issues)
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