Update machinaris app icon

charts/machinaris/item.yaml

@@ -1,4 +1,4 @@
 categories:
   - storage
   - crypto
-icon_url: https://raw.githubusercontent.com/guydavis/machinaris/main/web/static/favicon.ico
+icon_url: https://raw.githubusercontent.com/guydavis/machinaris/main/web/static/machinaris.png

test/machinaris/item.yaml

@@ -1,4 +1,4 @@
 categories:
   - storage
   - crypto
-icon_url: https://raw.githubusercontent.com/guydavis/machinaris/main/web/static/favicon.ico
+icon_url: https://raw.githubusercontent.com/guydavis/machinaris/main/web/static/machinaris.png