Update version skip after backport

rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/20_terms.yml

@@ -713,7 +713,7 @@ setup:
 ---
 "No field or script":
   - skip:
-      version: "all" # TODO change this after backport
+      version: " - 7.7.99"
       reason:  "Exception was a deep, server exception before 7.8"
   - do:
       catch: /Required one of fields \[field, script\], but none were specified/