Update metrics definitions

docs/06_metrics_dashboard.md

@@ -9,21 +9,20 @@ For metrics definitions see [metrics definitions](05_project_metrics.md).
 - Bar height is the time it took the build to finish (without queue time)
 
 ### Performance
-- Displays Performance metric
-- Data displayed for the last 7 days
-- The text shows average build length using data from the last 14 days - on current design screens, 
+- Displays "Performance" metric
+- Data displayed for the last 14 builds
+- The text shows average build length using data displayed - on current design screens, 
 it’s 20M - meaning 20 minutes
 
-### Builds
-- Displays Builds metric
-- Data displayed for the last 7 days
-- Text is the count of all builds for the last 7 days
+### Builds (7 days)
+- Displays "Builds" metric
+- Data displayed for the last 7 days cumulative
+- Text is the count of all builds in the date range
 
 ### Stability
-- Displays Stability metric
-- Data displayed for the last 7 days
+- Displays "Stability" metric
+- Data displayed for the last 14 builds
 
 ### Coverage
-- Displays Coverage metric
-- Data displayed for the last 7 days
-- Shows a number from the last build (successful or not?)
+- Displays "Coverage" metric
+- Data displayed for the last successful build