Add note about new windows app icon (#80)

docs/releasenotes.mdx

@@ -13,6 +13,7 @@ sidebar_position: 9
 * Added memory graphs, and per-CPU graphs to the sysinfo widget (and renamed it from cpuplot)
 * Added a new huge red "Config Error" button when there are parse errors in the config JSON file
 * Preview/CodeEdit widget now shows errors (squiggly lines) when JSON or YAML files fail to parse
+* New app icon for Windows to better match Fluent UI standards
 * Added copy-on-select to the terminal (on by default, can disable using "term:copyonselect")
 * Added a button to mute audio in webviews
 * Added a right-click "Open Clipboard URL" to easily open a webview from an URL stored in your system clipboard