Update GNOME maps walking route needle

It's more zoomed out now, possibly because the route changed.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

needles/gnome/apps/maps/maps_route_walk_shown-20230530.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "ypos": 419,
+      "height": 147,
+      "type": "match",
+      "width": 73,
+      "xpos": 339
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "maps_route_walk_shown"
+  ]
+}