fix: replace colbert-small-v1 model.onnx with 96-dim projected export (was 384-dim base encoder from upstream onnx/ subdir)

colbert-small-v1/model.onnx

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:b078342c7af055851eb25e599c7e362674e266aa52fe2d87d7bd325d3e3420e0
-size 133159107
+oid sha256:bd4bee8b055ed7a8e8b6e401792ae6e9137d9712c35eaa16f915ba69cae6d633
+size 133298178