Update line annotation diagram to describe new element structure (#752)

* Update line annotation diagram to describe new element structure

* applies review

Author: stockiNail

docs/diagrams/elementLineProps.drawio

@@ -1 +1 @@
-<mxfile host="Electron" modified="2022-04-06T13:35:32.574Z" agent="5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/16.5.1 Chrome/96.0.4664.110 Electron/16.0.7 Safari/537.36" etag="oTq1D7feHSuL3TBc9qwE" version="16.5.1" type="device"><diagram id="EVLCtf8sz0nmjKRDlPg8" name="Page-1">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</diagram></mxfile>
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docs/guide/migrationV2.md

@@ -61,6 +61,8 @@ The following diagram is showing the element properties about a `'box'` annotati
 
 ![box](../img/elementBoxProps.png)
 
+The label of a box annotation is described as a [label annotation](#label-annotation) and accessible by `element.label`.
+
 #### Ellipse annotation
 
 The following diagram is showing the element properties about a `'ellipse'` annotation:
@@ -75,10 +77,12 @@ The following diagram is showing the element properties about a `'label'` annota
 
 #### Line annotation
 
-The following diagram is showing the element properties about a `'line'` annotation and the inner label:
+The following diagram is showing the element properties about a `'line'` annotation:
 
 ![line](../img/elementLineProps.png)
 
+The label of a line annotation is described as a [label annotation](#label-annotation) and accessible by `element.label`.
+
 #### Point annotation
 
 The following diagram is showing the element properties about a `'point'` annotation: