make suggested changes

Author: CalMacCQ

docs/api.md

@@ -1,6 +1,6 @@
 # API documentation
 
-The pytket-quantinuum extension allows submission of pytket circuits to the Quantinuum trapped ion devices (and emulators) via the {py:class}`QuantinuumBackend`.
+The pytket-quantinuum extension allows submission of pytket circuits to Quantinuum systems (and emulators) via the {py:class}`QuantinuumBackend`.
 
 See the [pytket-quantinuum section](https://docs.quantinuum.com/h-series/trainings/getting_started/pytket_quantinuum/pytket_quantinuum.html) of the documentation website for some example usage.
 

docs/index.md

@@ -14,7 +14,7 @@ and Windows. To install, run:
 pip install pytket-quantinuum
 ```
 
-For example usage see the [pytket-quantinuum section](https://docs.quantinuum.com/h-series/trainings/getting_started/pytket_quantinuum/pytket_quantinuum.html) of the Quantinuum hardware documentation.
+For example usage see the [pytket-quantinuum section](https://docs.quantinuum.com/h-series/trainings/getting_started/pytket_quantinuum/pytket_quantinuum.html) of the Quantinuum Systems documentation.
 
 :::{note}
 pytket-quantinuum is not compatible with Quantinuum Nexus. For guidance on how to access H-Series through Nexus, please see the [Nexus documentation](https://docs.quantinuum.com/nexus) and the [qnexus](https://pypi.org/project/qnexus/) Python package.