Implemented the suggestion after the FE review

app/assets/javascripts/serverless/components/empty_state.vue

@@ -28,7 +28,7 @@ export default {
     <template #description>
       <gl-sprintf :message="$options.i18n.description">
         <template #postLink="{ content }">
-          <gl-link :href="$options.deprecationPostLink">{{ content }}</gl-link>
+          <gl-link :href="$options.deprecationPostLink" target="_blank">{{ content }}</gl-link>
         </template>
         <template #link="{ content }">
           <gl-link :href="helpPath">{{ content }}</gl-link>

spec/frontend/serverless/components/__snapshots__/empty_state_spec.js.snap

@@ -10,7 +10,7 @@ exports[`EmptyStateComponent should render content 1`] = `
       <h1 class=\\"gl-font-size-h-display gl-line-height-36 h4\\">
         Getting started with serverless
       </h1>
-      <p class=\\"gl-mt-3\\">Serverless was <gl-link-stub href=\\"https://about.gitlab.com/releases/2021/09/22/gitlab-14-3-released/#gitlab-serverless\\">deprecated</gl-link-stub>. But if you opt to use it, you must install Knative in your Kubernetes cluster first. <gl-link-stub href=\\"/help\\">Learn more.</gl-link-stub>
+      <p class=\\"gl-mt-3\\">Serverless was <gl-link-stub target=\\"_blank\\" href=\\"https://about.gitlab.com/releases/2021/09/22/gitlab-14-3-released/#gitlab-serverless\\">deprecated</gl-link-stub>. But if you opt to use it, you must install Knative in your Kubernetes cluster first. <gl-link-stub href=\\"/help\\">Learn more.</gl-link-stub>
       </p>
       <div class=\\"gl-display-flex gl-flex-wrap gl-justify-content-center\\">
         <!---->