Normalize practice exercise names (exercism#175)

We have added explicit exercise titles to the metadata.toml
files in problem-specifications.

This updates the exercise names to match the values
in this field.

Co-authored-by: Katrina Owen <[email protected]>

Author: glennj

config.json

@@ -52,7 +52,7 @@
       },
       {
         "slug": "leap",
-        "name": "Leap Years",
+        "name": "Leap",
         "uuid": "e95f1ade-287a-4391-ae28-82e037f39628",
         "practices": [],
         "prerequisites": [],
@@ -432,7 +432,7 @@
       },
       {
         "slug": "run-length-encoding",
-        "name": "Run Length Encoding",
+        "name": "Run-Length Encoding",
         "uuid": "642ddb58-625b-43b8-b7b9-3e0025dbd989",
         "practices": [],
         "prerequisites": [],