fix(heatmap): simplify range selection display by removing unnecessary span elements

frontend/src/components/git/ForgejoHeatmap.tsx

@@ -154,10 +154,7 @@ function RangeSelect({
       <SelectContent align="end" className="min-w-[8rem]">
         {RANGE_LABELS.map((range) => (
           <SelectItem key={range} value={range}>
-            <span className="flex w-full items-center justify-between gap-4">
-              <span>{range}</span>
-              <span className="text-xs text-muted">{RANGE_SUMMARY[range]}</span>
-            </span>
+            {RANGE_SUMMARY[range]}
           </SelectItem>
         ))}
       </SelectContent>