New updates to QPU info page (#3803)

Will also fix #3773

fyi @marcolincs @dcmckayibm

---------

Co-authored-by: Marco Facchini <[email protected]>

Author: abbycross

docs/guides/_toc.json

@@ -588,7 +588,7 @@
               "url": "/docs/guides/qpu-information"
             },
             {
-              "title": "Get QPU information with Qiskit",
+              "title": "Get backend information with Qiskit",
               "url": "/docs/guides/get-qpu-information"
             },
             {