Update the spacetime codes tutorial to use qiskit-paulice

docs/guides/post-selection.ipynb

@@ -414,7 +414,7 @@
     "<Admonition type=\"tip\" title=\"Recommendations\">\n",
     "  - Understand how to incorporate [noise learning](/docs/guides/noise-learning) into a quantum workload.\n",
     "  - Read through other available [error mitigation and suppression](/docs/guides/error-mitigation-and-suppression-techniques) techniques.\n",
-    "  - Learn how to use [spacetime codes](/docs/tutorials/ghz-spacetime-codes) for a low-overhead approach to error detection\n",
+    "  - Learn how to use [spacetime codes](/docs/tutorials/spacetime-codes) for a low-overhead approach to error detection\n",
     "</Admonition>"
    ]
   }

docs/tutorials/_toc.json

@@ -242,7 +242,9 @@
             },
             {
               "title": "Low-overhead error detection with spacetime codes",
-              "url": "/docs/tutorials/ghz-spacetime-codes"
+              "url": "/docs/tutorials/spacetime-codes",
+              "isNew": true,
+              "isNewDate": "2026-06-29"
             }
           ]
         }