Fixed text issue (#2003)

Author: JennaPaikowsky

doc/source/operator_reference.rst

@@ -24,7 +24,7 @@ DPF operators allow you to manipulate and transform simulation data.
 
 
 For Ansys 2023 R2 and later, the DPF Server licensing logic for operators in DPF depends on the active
-`server context<https://dpf.docs.pyansys.com/version/stable/api/ansys.dpf.core.server_context.html#ansys.dpf.core.server_context.ServerContext>`_.
+`server context <https://dpf.docs.pyansys.com/version/stable/api/ansys.dpf.core.server_context.html#ansys.dpf.core.server_context.ServerContext>`_.
 
 The available contexts are **Premium** and **Entry**.
 Licensed operators are marked as such in the documentation using the ``license`` property.