update errata

docs/errata/README.md

@@ -2,12 +2,12 @@ Dear Readers,
 
 again, I tried my best to cut all the little typos, errors, and formatting bugs that slipped through the copy editing stage. Even so, while I think it is just human to have a little typo here and there, I know that this can be quite annoying as a reader!
 
-As an incentive to get in touch in case you find errors in the books, I will donate $5 to [UNICEF USA](https://www.unicefusa.org), the US branch of the United Nations agency for raising funds to provide emergency food and healthcare for children in developing countries, for each little unreported buglet you find!
+To turn those annoyances into something positive, I will donate $5 to [UNICEF USA](https://www.unicefusa.org), the US branch of the United Nations agency for raising funds to provide emergency food and healthcare for children in developing countries, for each little unreported buglet you find!
 
 Also below, I added a small leaderboard to keep track of the errata submissions and errors you found. Please let me know if you don't want to be explicitely mentioned in that list! 
 
 
-- Amount for the next donation: 5$
+- Amount for the next donation: 10$
 - Amount donated: 0$
 
 
@@ -17,7 +17,7 @@ Also below, I added a small leaderboard to keep track of the errata submissions
 Contributor list:
 
 
-1. Gogy ($5)
+1. Gogy ($10)
 
 
 <br>
@@ -33,4 +33,10 @@ Contributor list:
 
 ### Errata
 
+pg. 55
+
 ![](./images/pg55.png)
+
+pg. 155
+
+![](./images/pg155.png)