Rename TimeSpan to Duration

Author: swallez

docs/modeling-guide.md

@@ -159,7 +159,7 @@ feel free to add more if it feels appropriate!
 Elasticsearch uses a lot of dates, times and durations. There are various types available to capture the variety of types and representations in the specification:
 
 * for date and time: `DateTime` for formatted dates, `EpochMillis`, `EpochSeconds`, etc. for number values
-* for intervals: `TimeSpan` for formatted values, `TimeSpanMillis`, `TimeSpanSeconds`, etc. for number values
+* for intervals: `Duration` for formatted values, `DurationMillis`, `DurationSeconds`, etc. for number values
 * for time of day: `TimeOfDay
 
 See [`specification/_types/Time.ts`](../specification/_types/Time.ts) for additional details.

docs/validation-example.md

@@ -69,7 +69,7 @@ open it with your favourite editor and perform the fix
      pipeline?: string;
      refresh?: Refresh;
      routing?: Routing;
-     timeout?: TimeSpan;
+     timeout?: Duration;
      version?: long;
      version_type?: VersionType;
      wait_for_active_shards?: string;