Update BrainGrid partner banner tagline (#554)

Author: davila7

dashboard/src/components/PartnerBanner.astro

@@ -23,8 +23,8 @@
         <span class="text-[13px] font-semibold" style="color: #c5e063;">BrainGrid</span>
         <span class="rounded px-1.5 py-px text-[9px] font-semibold uppercase tracking-wider" style="background: rgba(197,224,99,0.12); color: #c5e063; border: 1px solid rgba(197,224,99,0.18);">Partner</span>
       </div>
-      <p class="text-[13px] font-light text-[var(--color-text-secondary)] mt-0.5 truncate sm:whitespace-normal" style="opacity: 0.75;">
-        The repeatable way to plan and ship quality software with AI.
+      <p class="text-[13px] font-extralight text-[var(--color-text-secondary)] mt-0.5 truncate sm:whitespace-normal" style="opacity: 0.75;">
+        Plan entire products. Verify every build.
       </p>
     </div>