[Docs] Mark Rollup as Experimental instead of Beta
[Docs] Mark Rollup as Experimental instead of Beta

Original commit: elastic/x-pack-elasticsearch@75a59e1a2624bb60a960a86038f52c0b1a23aca0

strapdata/elassandra,strapdata/elassandra,strapdata/elassandra,strapdata/elassandra,vroyer/elassandra,vroyer/elassandra,strapdata/elassandra,vroyer/elassandra