Fix link to the "Planetary alignment blog post"

Reported-by: Tobias Bussmann <[email protected]>

templates/pages/about/policies/planet-postgresql.html

@@ -92,9 +92,10 @@ <h3>What constitutes an advertisement?</h3>
     that post is an ad.</p>
 
 <p>You can find a blog entry giving a more detailed opinion from one of the
-    moderators about this subject at <a
-            href="https://blog.2ndquadrant.com/planetary_alignment/">Planetary
-        alignment</a>. That commentary is not part of the official policy.</p>
+    moderators about this subject at
+    <a href="https://www.enterprisedb.com/blog/planetary-alignment" target="_blank" rel="noopener nofollow">Planetary alignment</a>.
+    That commentary is not part of the official policy.
+</p>
 
 <h3>Can I offer free or discounted products to people?</h3>
 <p>Not as your only post content. An article that otherwise meets the standards