Bump index version constant in "Test index mappings for latest internal index and audit index"

Author: przemekwitek

x-pack/qa/rolling-upgrade/src/test/resources/rest-api-spec/test/upgraded_cluster/80_transform_jobs_crud.yml

@@ -298,11 +298,11 @@ setup:
 
   - do:
       warnings:
-        - "this request accesses system indices: [.transform-internal-006], but in a future major version, direct access to system indices will be prevented by default"
+        - "this request accesses system indices: [.transform-internal-007], but in a future major version, direct access to system indices will be prevented by default"
       indices.get_mapping:
-        index: .transform-internal-006
-  - match: { \.transform-internal-006.mappings.dynamic: "false" }
-  - match: { \.transform-internal-006.mappings.properties.id.type: "keyword" }
+        index: .transform-internal-007
+  - match: { \.transform-internal-007.mappings.dynamic: "false" }
+  - match: { \.transform-internal-007.mappings.properties.id.type: "keyword" }
   - do:
       indices.get_mapping:
         index: .transform-notifications-000002