Fix successful shards

Author: carlosdelest

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/synonyms/90_synonyms_reloading_for_synset.yml

@@ -108,7 +108,7 @@
   - match: { result: "updated" }
   - set: { reload_analyzers_details._shards.total: total_shards }
   - gte: { reload_analyzers_details._shards.total: 2 } # Shards for all indices were reloaded. On serverless this may be more as there are more replicas
-  - match: { reload_analyzers_details._shards.successful: $total_shards }
+  - lt: { reload_analyzers_details._shards.successful: $total_shards } # Only shards for the first index are successful
   - length: { reload_analyzers_details.reload_details: 1 } # reload details contain only a single index
   - match: { reload_analyzers_details.reload_details.0.index: "my_index1" }
   - match: { reload_analyzers_details.reload_details.0.reloaded_analyzers.0: "my_analyzer1" }