fix(networkLogo): match NetworkIcon size so logo doesn't resize on collapse (#12)

NavigationDesktop swaps NetworkLogo (expanded) for NetworkIcon
(collapsed). With NetworkLogo at h=48px and NetworkIcon at 60x60
(after #9), toggling the sidebar visibly shrunk/grew the Rayls logo.

Bump NetworkLogo height to 60px (and the LogoFallback skeleton to
match) so both states render at the same size — the user only sees
the menu text expand/collapse, not the logo morph.

Author: alexandre-parfin

ui/snippets/networkLogo/NetworkLogo.tsx

@@ -15,7 +15,7 @@ const LogoFallback = () => {
     <IconSvg
       name="networks/logo-placeholder"
       width="240px"
-      height="48px"
+      height="60px"
       color={{ base: 'blue.600', _dark: 'white' }}
       aria-label="Network logo placeholder"
     />
@@ -37,7 +37,7 @@ const NetworkLogo = ({ className }: Props) => {
       aria-label="Link to main page"
     >
       <Image
-        h="48px"
+        h="60px"
         skeletonWidth="240px"
         src={ logoSrc }
         alt={ `${ config.chain.name } network logo` }