Update skip after backport of elastic#67043

Now that elastic#67043 has been backported we can update the skip so the bwc
tests don't complain.

Author: nik9000

rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/220_filters_bucket.yml

@@ -345,8 +345,8 @@ setup:
 ---
 nested:
   - skip:
-      version: " - 7.11.99"
-      reason:  fixed in 7.12.0 to be backported to 7.11.0
+      version: " - 7.10.99"
+      reason:  fixed in 7.11.0
 
   # Tests that we don't accidentally match nested documents when the filter
   # matches it.