change in notebook

docs/start/hello-world.ipynb

@@ -123,8 +123,8 @@
    "id": "88fe43f8",
    "metadata": {},
    "source": [
-    "<Admonition type=\"note\" title=\"Important:\">\n",
-    "To ensure faster and more efficient results, as of 1 March2024, circuits and observables need to be transformed to only use instructions supported by the system (referred to as *instruction set architecture (ISA)* circuits and observables) before being submitted to the Qiskit Runtime primitives.  See the [transpilation documentation](../transpile) for instructions to transform circuits.  Due to this change, the primitives will no longer perform layout or routing operations; consequently, transpilation options referring to those tasks will no longer have any effect. Users may still request that the Primitives do no optimization of input circuits via `options.transpilation.skip_transpilation`.\n",
+    "<Admonition type=\"caution\" title=\"Important\">\n",
+    "To ensure faster and more efficient results, as of 1 March 2024, circuits and observables need to be transformed to only use instructions supported by the system (referred to as *instruction set architecture (ISA)* circuits and observables) before being submitted to the Qiskit Runtime primitives.  See the [transpilation documentation](../transpile) for instructions to transform circuits.  Due to this change, the primitives will no longer perform layout or routing operations; consequently, transpilation options referring to those tasks will no longer have any effect. Users may still request that the Primitives do no optimization of input circuits via `options.transpilation.skip_transpilation`.\n",
     "</Admonition>"
    ]
   },