style: Adjust notification icon

.github/readme-images/app-icon.inkscape.svg

@@ -25,8 +25,8 @@
      inkscape:pageopacity="0"
      inkscape:pageshadow="2"
      inkscape:zoom="0.35000001"
-     inkscape:cx="548.57141"
-     inkscape:cy="869.99998"
+     inkscape:cx="602.85713"
+     inkscape:cy="627.14284"
      inkscape:document-units="px"
      inkscape:current-layer="svg8"
      inkscape:document-rotation="0"
@@ -389,4 +389,18 @@
        style="font-weight:900;font-stretch:condensed;font-size:254px;line-height:1.25;font-family:'Nunito Sans 7pt Condensed';-inkscape-font-specification:'Nunito Sans 7pt Condensed,  Heavy Condensed';fill:#ffffff;stroke-width:0.264583"
        d="m -497.13503,584.41228 v -93.218 l 7.874,30.734 -62.738,-116.586 h 49.022 l 28.194,66.04 h 1.016 l 28.448,-66.04 h 48.26 l -62.992,116.586 7.874,-30.734 -0.254,93.218 z"
        id="path35"
-       aria-label="Y" /></g></svg>
+       aria-label="Y" /></g><g
+     id="g4"
+     inkscape:label="monochrome icon padding"><rect
+       style="fill:#000000;stroke-width:0.427425"
+       id="rect1"
+       width="338.66663"
+       height="95.298286"
+       x="0"
+       y="0" /><rect
+       style="fill:#000000;stroke-width:0.427425"
+       id="rect2"
+       width="338.66663"
+       height="95.298286"
+       x="0"
+       y="243.36835" /></g></svg>