Merge pull request #1421 from cpswan/cpswan-atsign

docs: Adopters - s/The @ Company/Atsign/ following rebrand

ADOPTERS.md

@@ -48,6 +48,11 @@ Users
     * N: AT&T 
       L: https://medium.com/cloud-native-the-gathering/certified-kubernetes-administrator-join-our-team-its-a-good-thing-7e27ab34dc88
       D: "We are integrating Flatcar Container Linux, Istio, OPA, Multi-Region, KNative, and so many other technologies and concepts it makes the mind hurt a bit."
+
+    * N: Atsign
+      D: Personal Data Services 'atServers' are Dart ahead of time binaries running in containers on Docker Swarm using Flatcar worker nodes.
+      L: https://twitter.com/cpswan/status/1534481517887512577?s=20&t=ODnO_TPa4nhC62KNAB9Stw
+      C: Chris Swan [@cpswan](https://github.com/cpswan)
       
     * N: Cloud house
       D: Flatcar OS has been useful for us for our on-premise solution to our customers 
@@ -113,9 +118,5 @@ Users
       L: https://www.stackit.de/de/produkt/stackit-kubernetes-engine/
       C: [[email protected]](mailto:[email protected])
 
-    * N: The @ Company 
-      L: https://twitter.com/cpswan/status/1534481517887512577?s=20&t=ODnO_TPa4nhC62KNAB9Stw
-      C: Chris Swan https://twitter.com/cpswan/
-
     * N: Wipro
       D: Wipro Business Solutions uses Flatcar Linux to power their hybrid/multi-cloud PostgreSQL containerized DBaaS platform. Each provisioned database is running on a dedicated lightweight stack with Flatcar Linux as the foundational OS running on each database VM. In addition the DBaaS API itself and all supporting machines use Flatcar Linux as well. Flatcar Linux has proven to be a well-supported rock solid OS with minimal attack surface, built in update mechanism and integrated docker daemon. Ignition brings in an early boot provisioning utility that perfectly adds to the full automation approach of the PostgreSQL DBaaS platform. We use it at scale on-prem with OpenStack cloud but also with public clouds like Google and Tencent