internal/content/telemetrygodev: s/Count/Reports to clarify y axis

Partition charts plot the number of reports, not total counts contained
within those reports. Clarify this in the y axis label.

Change-Id: Id3036d0dcb1131d72bcc2f57fcaeeab973dfc474
Reviewed-on: https://go-review.googlesource.com/c/telemetry/+/603856
Reviewed-by: Alan Donovan <[email protected]>
Auto-Submit: Robert Findley <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>

Author: findleyr

internal/content/telemetrygodev/charts.ts

@@ -81,7 +81,7 @@ function partition({ Data, Name }: Chart) {
       domain: Data.map((d) => d.Key),
     },
     y: {
-      label: "Count",
+      label: "Reports", // currently, partition charts count the number of reports, not counter totals.
       domain: [0, max + 1], // adjust domain to prevent rendering issues, especially with all-zero data.
     },
     width: 1024,