docs(nextjs): Fix tabs for Nx 18 (#22338)

Author: ndcunningham

docs/generated/packages/next/documents/overview.md

@@ -74,9 +74,7 @@ The `@nx/next/plugin` is configured in the `plugins` array in `nx.json`.
 - The `serveStaticTargetName` option controls the name of Next.js' static export task which exports the application to static HTML files. The default name is `serve-static`.
 
 {% /tab %}
-{% tab label="Nx < 18" %}
 
-{% /tab %}
 {% tab label="Nx < 18" %}
 
 Install the `@nx/next` package with your package manager.

docs/shared/packages/next/plugin-overview.md

@@ -74,9 +74,7 @@ The `@nx/next/plugin` is configured in the `plugins` array in `nx.json`.
 - The `serveStaticTargetName` option controls the name of Next.js' static export task which exports the application to static HTML files. The default name is `serve-static`.
 
 {% /tab %}
-{% tab label="Nx < 18" %}
 
-{% /tab %}
 {% tab label="Nx < 18" %}
 
 Install the `@nx/next` package with your package manager.