Feature/harmonize no data available label (#885)

* Harmonize label for UNKNOWN_KEY

* Update changelog

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Changed
+
+- Harmonized the _No data available_ label in the portfolio proportion chart component
+
 ## 1.145.0 - 07.05.2022
 
 ### Added

libs/ui/src/lib/portfolio-proportion-chart/portfolio-proportion-chart.component.ts

@@ -349,7 +349,7 @@ export class PortfolioProportionChartComponent
           if (symbol === this.OTHER_KEY) {
             symbol = 'Other';
           } else if (symbol === UNKNOWN_KEY) {
-            symbol = 'Unknown';
+            symbol = 'No data available';
           }
 
           const name = this.positions[<string>symbol]?.name;