Update CI badge location (#12)

diff --git a/README.md b/README.md
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--- a/README.md
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 VTA Hardware Design Stack
 =========================
-[![Build Status](https://ci.tvm.ai/job/tvm-vta/job/master/badge/icon)](https://ci.tvm.ai/job/tvm-vta/job/master/)
+[![Build Status](https://ci.tlcpack.ai/job/tvm-vta/job/master/badge/icon)](https://ci.tlcpack.ai/job/tvm-vta/job/master/)
 
 VTA (versatile tensor accelerator) is an open-source deep learning accelerator complemented with an end-to-end TVM-based compiler stack.