Fix logo visibility issue in dark mode

Fixes #189

Update the dark mode logo configuration in `docs/docusaurus.config.js`.

* Change the `srcDark` property to point to the light mode logo URL.

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For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/SamagraX-Stencil/stencil/issues/189?shareId=XXXX-XXXX-XXXX-XXXX).

docs/docusaurus.config.js

@@ -35,7 +35,7 @@ module.exports = {
       logo: {
         alt: 'Site Logo',
         src: 'https://tech.samagragovernance.in/wp-content/uploads/2021/02/L2-e1614174909114.png',
-        srcDark: '/logos/dark-logo.png',
+        srcDark: 'https://tech.samagragovernance.in/wp-content/uploads/2021/02/L2-e1614174909114.png',
         href: '/',
         target: '_self',
         width: 140,