Drop redundant 'engineering knowledge base' tagline (#779)

The strong heading already says 'Collaborative knowledge base for
agent artifacts'; trailing 'Craft your shared engineering knowledge
base.' was just restating it.

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Author: backnotprop

apps/marketing/src/pages/workspaces/index.astro

@@ -102,7 +102,7 @@ const teamSizes = [
             <strong>Collaborative knowledge base for agent artifacts.</strong>
             Share plans, specs, explainers, and reviews with your team
             (and agents) in markdown or HTML, before and after agents
-            code. Craft your shared engineering knowledge base.
+            code.
           </li>
           <li>
             <strong>Artifacts and annotations become standards.</strong>