docs: use 10e9, not 10e8, for GB Estimate calculation

@annettejanewilson actually deserves the credit for spotting this 😄

Unless the definition of bytes or `GB` is unusual, dividing by `10e8` doesn't seem right!

Author: rnorth

src/content/docs/accounts/accounts-billing/new-relic-one-pricing-billing/usage-queries-alerts.mdx

@@ -65,7 +65,7 @@ The [usage UI](/docs/accounts/accounts-billing/new-relic-one-pricing-billing/new
     This query breaks down [Metric data](/docs/telemetry-data-platform/understand-data/new-relic-data-types/#dimensional-metrics) by the top ten metric names. You could also facet by `appName` or `host` to adjust the analysis.
 
     ```sql
-    FROM Metric SELECT bytecountestimate()/10e8 AS 'GB Estimate' 
+    FROM Metric SELECT bytecountestimate()/10e9 AS 'GB Estimate' 
     SINCE 24 hours ago
     FACET metricName LIMIT 10 TIMESERIES 1 hour
     ```