Replace APM agents with OpenTelemetry (#1406)

Author: theletterf

src/Elastic.Markdown/Slices/Layout/_LandingPage.cshtml

@@ -191,10 +191,10 @@
 					</div>
 				</div>
 				<div class="flex flex-col rounded-xl bg-white">
-					<h3 class="font-sans font-bold text-ink-dark text-2xl">APM agents</h3>
-					<p class="grow mt-3">Browse the APM agent docs for RUM JavaScript, Java, .NET, and more.</p>
+					<h3 class="font-sans font-bold text-ink-dark text-2xl">OpenTelemetry</h3>
+					<p class="grow mt-3">Browse the docs for the Elastic Distributions of OpenTelemetry (EDOT).</p>
 					<div class="mt-6">
-						<a href="@Model.Link("/reference/apm-agents/")" class="link">
+						<a href="@Model.Link("/reference/opentelemetry/")" class="link">
 							View docs
 						</a>
 					</div>