doc/notifications: change stroke color

This makes the stroke visible on black background.

doc/notifications/check-routeros-update.svg

@@ -86,7 +86,7 @@
      id="layer1"
      transform="translate(16.375,11.083333)">
     <rect
-       style="fill:#e6e6e6;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1"
+       style="fill:#e6e6e6;stroke:#6c5d53;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1"
        id="rect857"
        width="137.58333"
        height="66.145821"
@@ -96,7 +96,7 @@
     <g
        id="g884"
        transform="matrix(0.5,0,0,0.5,-12.40625,-7.1145834)"
-       style="stroke-width:1.99999">
+       style="stroke-width:2">
       <path
          sodipodi:type="star"
          style="fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:0.264584;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1"
@@ -114,7 +114,7 @@
          d="m 23.177407,23.177407 c -2.963458,2.963458 -17.9913546,2.963458 -20.9548127,0 -2.96345803,-2.963458 -2.96345808,-17.9913546 0,-20.9548127 2.963458,-2.96345803 17.9913547,-2.96345808 20.9548127,0 2.963458,2.963458 2.963458,17.9913547 0,20.9548127 z" />
       <g
          id="g871"
-         style="stroke-width:1.99999">
+         style="stroke-width:2">
         <g
            aria-label="#!rsc"
            id="text837">
@@ -226,10 +226,5 @@
          x="61.890625"
          y="258.7301"
          id="tspan13569">🔗 https://mikrotik.com/download/changelogs/stable-release-tree</tspan></text>
-    <text
-       xml:space="preserve"
-       transform="matrix(0.26458331,0,0,0.26458331,-16.375,-11.083333)"
-       id="text51083"
-       style="font-weight:bold;font-size:26.6667px;line-height:25px;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Bold';text-align:center;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;white-space:pre;shape-inside:url(#rect51085);fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
   </g>
 </svg>