Revert docs version

Author: JoeyT1994

docs/Project.toml

@@ -9,7 +9,7 @@ TensorOperations = "6aa20fa7-93e2-5fca-9bc0-fbd0db3c71a2"
 [compat]
 Documenter = "1.9.0"
 HDF5 = "0.17.2"
-ITensors = "0.9.0"
+ITensors = "0.8.4"
 Strided = "2.2.0"
 TensorOperations = "5.1.4"
 LinearAlgebra = "1.10.0"