projects: reword index tagline; split global infra into estate + network-automation

- New projects tagline + open-minded lead
- Split the combined infra project: keep the estate/cloud modernisation,
  add a dedicated Network Automation at Fleet Scale case (Unimus + NetBox,
  config backup, bulk push, vaulted+rotated credentials) from the Linde role

src/pages/projects/index.astro

@@ -10,10 +10,11 @@ const projects = (await getCollection("projects")).sort(
 ---
 
 <Layout title="Projects" path="/projects" description="Selected platform & infrastructure projects by Jonathon Wright.">
-  <Section id="all-projects" eyebrow="Projects" index="*" title="Everything I've built worth writing about.">
+  <Section id="all-projects" eyebrow="Projects" index="*" title="Some bytes I'm proud of — a starting line, not a trophy shelf.">
     <p class="lead projects__intro" data-reveal>
-      Edge Kubernetes, GPU inference, self-hosted AI, and the automation that ties it
-      together — each with the problem, the design, and the outcome.
+      Edge Kubernetes, GPU inference, self-hosted AI, productionised network automation, and
+      the infrastructure rigour that ties it together — each with the problem, the design, and
+      the outcome. More always cooking.
     </p>
     <div class="grid">
       {projects.map((entry) => <ProjectCard entry={entry} />)}