docs(testimonials): add Joe Howell

src/components/Testimonials.astro

@@ -11,6 +11,7 @@ const defaultNames = [
   'brian-hartwell',
   'anonymous',
   'huw-davies',
+  'joe-howell',
   'michael-itkoff',
   'mick-felton',
   'scott-euser',

src/content/testimonial/joe-howell.json

@@ -0,0 +1,7 @@
+{
+  "name": "Joe Howell",
+  "tagline": "Director, Bastion Insurance",
+  "text": "<p>I've worked with Oliver for a number of years on B2C and B2B web projects and he has always demonstrated himself to be an expert in his field. As an insurance provider, some of our products and services don't naturally fit within a traditional ecommerce journey - but Oliver has always been able to come up with innovative ways to leverage core Drupal functionality and develop custom modules to meet our needs. Friendly, flexible and diligent – I wouldn't hesitate to recommend Oliver to anyone looking for a Drupal developer to progress their next project.",
+  "image": "joe-howell.jpg",
+  "url": "https://bastioninsurance.co.uk"
+}

src/pages/testimonials.mdx

@@ -18,6 +18,7 @@ import Testimonials from "~/components/Testimonials.astro";
   'holly-ross',
   'huw-davies',
   'james-chapman',
+  'joe-howell',
   'jon-hallett',
   'josh-mitchell',
   'leonie-watson',