improve menu

Author: burtenshaw

chapters/en/_toctree.yml

@@ -14,7 +14,7 @@
   - local: chapter1/4
     title: How do Transformers work?
   - local: chapter1/5
-    title: How 🤗 Transformers solve tasks
+    title: Solving Tasks with Transformers
   - local: chapter1/6
     title: Transformer Architectures
   - local: chapter1/7