fix: add color to logo for dark mode

docs/website/static/img/super-graph-logo.svg

@@ -2,7 +2,7 @@
 <svg width="378px" height="314px" viewBox="0 0 378 314" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
     <title>battery-technology-svgrepo-com</title>
     <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
-        <g id="battery-technology-svgrepo-com" fill="#000000" fill-rule="nonzero">
+        <g id="battery-technology-svgrepo-com" fill="#444AA9" fill-rule="nonzero">
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             <path d="M196,269.076 L184,269.076 C179.6,269.076 176,272.676 176,277.076 C176,281.476 179.6,285.076 184,285.076 L196,285.076 C200.4,285.076 204,281.476 204,277.076 C204,272.676 200.4,269.076 196,269.076 Z" id="Path"></path>