WIP fixup

Author: jbdietrich

src/lib/electricitymaps/index.ts

@@ -75,7 +75,7 @@ export const ElectricityMapsCarbonIntensity = (): PluginInterface => {
           );
         }
         // This is the last hourly block, the ratio is the time between the start of the hour and the end.
-        if (hour === hours - 1) {
+        if (hour === numHours - 1) {
           return (
             end.diff(start.add(hour, 'hour').startOf('hour'), 'second') / 3600
           );