Adjust bwc version for invalid retaining seq_no exception

Relates #46420

server/src/main/java/org/elasticsearch/ElasticsearchException.java

@@ -1032,7 +1032,7 @@ public class ElasticsearchException extends RuntimeException implements ToXConte
                 org.elasticsearch.index.seqno.RetentionLeaseInvalidRetainingSeqNoException.class,
                 org.elasticsearch.index.seqno.RetentionLeaseInvalidRetainingSeqNoException::new,
                 156,
-                Version.V_8_0_0);
+                Version.V_7_5_0);
 
         final Class<? extends ElasticsearchException> exceptionClass;
         final CheckedFunction<StreamInput, ? extends ElasticsearchException, IOException> constructor;