Add remove_whitespace to FLD benchmark (#1206)

* Add remove_whitespace to FLD benchmark

* bump task version

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Co-authored-by: Hailey Schoelkopf <65563625+haileyschoelkopf@users.noreply.github.com>

lm_eval/tasks/fld/fld_default.yaml

@@ -12,5 +12,10 @@ metric_list:
   - metric: exact_match
     aggregation: mean
     higher_is_better: true
+filter_list:
+  - name: remove_whitespace
+    filter:
+      - function: remove_whitespace
+      - function: take_first
 metadata:
-  version: 0.0
+  version: 1.0