Add Bringg to who-is-using.md (#523)

Author: EladDolev

docs/who-is-using.md

@@ -6,6 +6,7 @@
 | Lightbend |@yuchaoran2011| Production | Data Infrastructure & Operations |
 | StackTome | @emiliauskas-fuzzy | Production | Data pipelines |
 | Salesforce | @khogeland | Production | Data transformation |
+| Bringg | @EladDolev | Production | ML & Analytics Data Platform |
 | CERN|@mrow4a| Evaluation | Data Mining & Analytics |
 | Lyft |@kumare3| Evaluation | ML & Data Infrastructure |
 | MapR Technologies |@sarjeet2013| Evaluation | ML/AI & Analytics Data Platform |