chore: update template opt-in checkbox (#18481)

<img width="848" alt="Screenshot 2025-06-20 at 20 01 55"
src="https://github.com/user-attachments/assets/bd825778-3d10-49e1-bcc3-193516ed3ba6"
/>

site/src/pages/TemplateSettingsPage/TemplateGeneralSettingsPage/TemplateSettingsForm.tsx

@@ -10,6 +10,7 @@ import {
 } from "api/typesGenerated";
 import { PremiumBadge } from "components/Badges/Badges";
 import { Button } from "components/Button/Button";
+import { FeatureStageBadge } from "components/FeatureStageBadge/FeatureStageBadge";
 import {
 	FormFields,
 	FormFooter,
@@ -17,6 +18,7 @@ import {
 	HorizontalForm,
 } from "components/Form/Form";
 import { IconField } from "components/IconField/IconField";
+import { Link } from "components/Link/Link";
 import { Spinner } from "components/Spinner/Spinner";
 import { Stack } from "components/Stack/Stack";
 import {
@@ -25,6 +27,7 @@ import {
 } from "components/StackLabel/StackLabel";
 import { type FormikTouched, useFormik } from "formik";
 import type { FC } from "react";
+import { docs } from "utils/docs";
 import {
 	displayNameValidator,
 	getFormHelpers,
@@ -230,21 +233,37 @@ export const TemplateSettingsForm: FC<TemplateSettingsForm> = ({
 								size="small"
 								id="use_classic_parameter_flow"
 								name="use_classic_parameter_flow"
-								checked={form.values.use_classic_parameter_flow}
-								onChange={form.handleChange}
+								checked={!form.values.use_classic_parameter_flow}
+								onChange={(event) =>
+									form.setFieldValue(
+										"use_classic_parameter_flow",
+										!event.currentTarget.checked,
+									)
+								}
 								disabled={false}
 							/>
 						}
 						label={
 							<StackLabel>
-								Use classic workspace creation form
+								<span className="flex flex-row gap-2">
+									Enable dynamic parameters for workspace creation
+									<FeatureStageBadge contentType={"beta"} size="sm" />
+								</span>
 								<StackLabelHelperText>
-									<span>
-										Show the original workspace creation form and workspace
-										parameters settings form without dynamic parameters or live
-										updates. Recommended if your provisioners aren't updated or
-										the dynamic form causes issues.
-									</span>
+									<div>
+										The new workspace form allows you to design your template
+										with new form types and identity-aware conditional
+										parameters. The form will only present options that are
+										compatible and available.
+									</div>
+									<Link
+										className="text-xs"
+										href={docs(
+											"/admin/templates/extending-templates/parameters#dynamic-parameters-beta",
+										)}
+									>
+										Learn more
+									</Link>
 								</StackLabelHelperText>
 							</StackLabel>
 						}