Fix BwC Bug in Converting GetSnapshotsRequest (#74696)

Follow-up to #74676 where I missed a spot in request conversions.

Author: original-brownbear

client/rest-high-level/src/main/java/org/elasticsearch/client/SnapshotRequestConverters.java

@@ -130,7 +130,7 @@ static Request cloneSnapshot(CloneSnapshotRequest cloneSnapshotRequest) throws I
 
     static Request getSnapshots(GetSnapshotsRequest getSnapshotsRequest) {
         RequestConverters.EndpointBuilder endpointBuilder = new RequestConverters.EndpointBuilder().addPathPartAsIs("_snapshot")
-            .addPathPart(getSnapshotsRequest.repository());
+            .addCommaSeparatedPathParts(getSnapshotsRequest.repositories());
         String endpoint;
         if (getSnapshotsRequest.snapshots().length == 0) {
             endpoint = endpointBuilder.addPathPart("_all").build();