Update "Cook your lasagna" to title-case (#2826)

This it to make the exercise name consistent with the other exercises.

Author: ConeDragon

config.json

@@ -36,7 +36,7 @@
     "concept": [
       {
         "slug": "lasagna",
-        "name": "Cook your lasagna",
+        "name": "Cook Your Lasagna",
         "uuid": "01924e92-ecc7-4ba6-83f9-f142c0756b9f",
         "concepts": [
           "basics"