fix the clip path of the british flag

The Hugo minifier turns "z v15" into "z 15", which is an invalid SVG
path: the red diagonals of the flag were not clipped. Starting each
subpath with an explicit moveto avoids the issue.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YNHsWYTXPThURz6TbVS1j3

layouts/_partials/icons/en.svg

@@ -4,7 +4,7 @@
 	<path d="M0,0 v30 h60 v-30 z"/>
 </clipPath>
 <clipPath id="t">
-	<path d="M30,15 h30 v15 z v15 h-30 z h-30 v-15 z v-15 h30 z"/>
+	<path d="M30,15 H60 V30 Z M30,15 V30 H0 Z M30,15 H0 V0 Z M30,15 V0 H60 Z"/>
 </clipPath>
 <g clip-path="url(#s)">
 	<path d="M0,0 v30 h60 v-30 z" fill="#012169"/>