matched sizes of bottom titles in aqi charts.

lib/pages/analytics/modules/air_quality/helpers/range_of_aqi_charts_helper.dart

@@ -23,6 +23,7 @@ abstract final class RangeOfAqiChartsHelper {
     return titlesData.copyWith(
       bottomTitles: titlesData.bottomTitles.copyWith(
         sideTitles: titlesData.bottomTitles.sideTitles.copyWith(
+          reservedSize: 36,
           getTitlesWidget: (value, meta) => Padding(
             padding: const EdgeInsetsDirectional.only(top: 20.0),
             child: Text(

lib/pages/analytics/modules/air_quality/widgets/aqi_distribution_chart.dart

@@ -162,6 +162,7 @@ class AqiDistributionChart extends StatelessWidget {
             ),
           ),
         ),
+        reservedSize: 36,
       ),
     );