add gradient to bevy badge

doc/images/badge-bevy.svg

@@ -11,6 +11,7 @@
    sodipodi:docname="badge-bevy.svg"
    xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
    xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns="http://www.w3.org/2000/svg"
    xmlns:svg="http://www.w3.org/2000/svg">
   <sodipodi:namedview
@@ -23,9 +24,9 @@
      inkscape:pagecheckerboard="0"
      inkscape:deskcolor="#d1d1d1"
      inkscape:document-units="mm"
-     inkscape:zoom="7.2114178"
-     inkscape:cx="65.659765"
-     inkscape:cy="4.3680731"
+     inkscape:zoom="2.5496212"
+     inkscape:cx="-57.459516"
+     inkscape:cy="53.145149"
      inkscape:window-width="2880"
      inkscape:window-height="1765"
      inkscape:window-x="0"
@@ -33,13 +34,35 @@
      inkscape:window-maximized="1"
      inkscape:current-layer="layer1" />
   <defs
-     id="defs1" />
+     id="defs1">
+    <linearGradient
+       id="linearGradient2"
+       inkscape:collect="always">
+      <stop
+         style="stop-color:#1f1f1f;stop-opacity:1;"
+         offset="0"
+         id="stop2" />
+      <stop
+         style="stop-color:#4b4b4b;stop-opacity:1;"
+         offset="1"
+         id="stop3" />
+    </linearGradient>
+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient2"
+       id="linearGradient3"
+       x1="17.859375"
+       y1="5.2916665"
+       x2="17.859375"
+       y2="1.3729758e-15"
+       gradientUnits="userSpaceOnUse" />
+  </defs>
   <g
      inkscape:label="Layer 1"
      inkscape:groupmode="layer"
      id="layer1">
     <rect
-       style="fill:#333333;fill-opacity:1;stroke:none;stroke-width:0.153787;stroke-linejoin:round;stroke-dasharray:none"
+       style="fill:url(#linearGradient3);fill-opacity:1;stroke:none;stroke-width:0.153787;stroke-linejoin:round;stroke-dasharray:none"
        id="rect1"
        width="35.71875"
        height="5.2916665"