Remove admonition (#3964)

Wait till we get the green light to merge.
Also, do not merge before the referenced announcement merges!

Finishes work started in #3943

Author: abbycross

docs/guides/classical-feedforward-and-control-flow.ipynb

@@ -34,8 +34,8 @@
    "id": "67b2704d-aa3d-4e39-b417-536093be274e",
    "metadata": {},
    "source": [
-    "<Admonition type=\"note\">\n",
-    "Dynamic circuit support on Qiskit Runtime is only available through early access. Users interested in participating in this early access should [contact support.](/docs/support#get-help-with-qiskit-and-ibm-quantum-platform)\n",
+    "<Admonition type=\"note\" title=\"Dynamic circuits now available on all backends\">\n",
+    "The new version of dynamic circuits is now available to all users on all backends. You can now run dynamic circuits at utility scale. See [the announcement](/announcements/product-updates/2025-09-25-new-dynamic-circuits) for more details.\n",
     "</Admonition>\n",
     "\n",
     "Dynamic circuits are powerful tools with which your can measure qubits in the middle of a quantum circuit execution and then perform classical logic operations within the circuit, based on the outcome of those mid-circuit measurements.  This process is also known as _classical feedforward_. While these are early days of understanding how best to take advantage of dynamic circuits, the quantum research community has already identified a number of use cases, such as the following:\n",

scripts/js/commands/checkInternalLinks.ts

@@ -39,6 +39,7 @@ const SYNTHETIC_FILES: string[] = [
   "announcements/product-updates.mdx",
   "announcements/index.mdx",
   "announcements/product-updates/2025-03-03-new-version-dynamic-circuits.mdx",
+  "announcements/product-updates/2025-09-25-new-dynamic-circuits.mdx",
 ];
 
 interface Arguments {