Update boot-library.md (#225)

igor-petruk · web-flow · commit 356d1cec19f4 · 2023-01-23T11:30:52.000Z
Adding a link to the Solution.
diff --git a/src/exercises/day-1/book-library.md b/src/exercises/day-1/book-library.md
@@ -40,3 +40,9 @@ Use this to create a library application. Copy the code below to
 
 {{#include book-library.rs:main}}
 ```
+
+<details>
+    
+[Solution](solutions-afternoon.md#designing-a-library)
+
+</details>
