docs: remove divider in chapter 6 and simplify epilogue title

Author: thinkingjimmy

src/content/the-last-economy/_meta.js

@@ -66,6 +66,6 @@ export default {
     title: '21. After Economics'
   },
   'epilogue': {
-    title: 'Epilogue: The Thousandth Day'
+    title: 'Epilogue'
   },
 }

src/content/the-last-economy/chapter-6.mdx

@@ -10,8 +10,6 @@
 > "The whole of science is nothing more than a refinement of everyday thinking."
 > —Albert Einstein
 
----
-
 ## The Universe's Only Law That Matters
 
 There is a law that governs the universe, a rule so fundamental and inescapable that the physicist Arthur Eddington called it "the supreme law of Nature." It is the Second Law of Thermodynamics. It states, with brutal simplicity, that everything falls apart.