increase opacity of neighbour lines as they are hard to see on satell…

…ite imagery

src/public/index.html

@@ -2770,7 +2770,7 @@ <h3 v-if="selectedNodeToShowNeighboursType === 'heard_us'" class="text-sm">Nodes
                         neighbourNodeMarker.getLatLng(),
                     ], {
                         color: '#2563eb',
-                        opacity: 0.5,
+                        opacity: 0.75,
                         offset: polylineOffset,
                     }).addTo(neighboursLayerGroup);