Update bpmn-coverage.md (#4155)

* Update bpmn-coverage.md

We support Data Object and Data Store in Modeler + for execution. This needs to be reflected in bpmn-coverage

* add admonition

* backport

* revert backport

---------

Co-authored-by: Christina Ausley <christina.ausley@camunda.com>
Co-authored-by: christinaausley <84338309+christinaausley@users.noreply.github.com>

docs/components/modeler/bpmn/bpmn-coverage.md

@@ -140,15 +140,19 @@ import CompensationSvg from './assets/bpmn-symbols/compensation.svg'
 
 ## Data
 
+:::note
+`DataObject` and `DataStore`, like other BPMN standard IO mappings, are supported by Camunda for modeling purposes only.
+:::
+
 import DataObjectSvg from './assets/bpmn-symbols/data-object.svg'
 import DataStoreSvg from './assets/bpmn-symbols/data-store.svg'
 
 <div className="bpmn-symbol-container">
     <a href="#">
-        <DataObjectSvg />
+        <DataObjectSvg className="implemented" />
     </a>
     <a href="#">
-        <DataStoreSvg />
+        <DataStoreSvg className="implemented" />
     </a>
 </div>