change publication date

Author: sbonaretti

index.html

@@ -240,7 +240,7 @@ <h2>About the Book</h2>
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-            <center>Next upload: <b>Chapter 28</b> on <b>August 26</b> </center>
+            <center>Next upload: <b>Chapter 28</b> on <b>September 9</b> </center>
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