Config metadata fix

# Why is the change needed?

There is a typo in the `schwa_simple` configuration, which breaks Hugging Face's correct loading of it.

# What changes does the patch introduce?

We fix the typo in the path to `adapted/Neo-GATE_dev_schwa-simple.tsv`.

# How was this patch tested?

No test required.

README.md

@@ -12,7 +12,7 @@ configs:
       - split: test
         path: adapted/Neo-GATE_schwa-simple.tsv
       - split: dev
-        path: adapted/Neo-GATE-dev_schwa-simple.tsv
+        path: adapted/Neo-GATE_dev_schwa-simple.tsv
 license: cc-by-4.0
 task_categories:
 - translation