Update skip before backport of elastic#67043

When I merged elastic#67043 it had an integration test for the thing it was
fixing but it still fails in the bwc tests. Yikes! I should know better
but life is life. Anyway, this updates the skip to ignore the test for
now. I'll reenable once the backport is in.

Author: nik9000

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

@@ -344,6 +344,10 @@ setup:
 
 ---
 nested:
+  - skip:
+      version: " - 7.99.99"
+      reason:  cache fixed in 8.0.0 to be backported to 7.11.0
+
   # Tests that we don't accidentally match nested documents when the filter
   # matches it.
   - do: