feat: update model

- found some performance degradation in old version, will investigate

decoder_model_merged_quantized.onnx

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:494be801ecc8c76b36dbd1bc4b0eb1ec5206c7e34156ea73348a5fa16d728b91
-size 240010429
+oid sha256:ed067534a996c818708d0d377b94ace32b9738f0d7a0c4ef635e4fa3d28653ce
+size 239901134

encoder_model_quantized.onnx

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:aea48c6a6a9d5949b1b7e5fd2c2137149bc1687f026d44469ee3178c90d4d11a
-size 79003122
+oid sha256:302452c132a82b1c70389f0f646952586afa20c3f9a16b517e40600c49eb8f23
+size 79294829