release: Release opentelemetry-metrics-sdk 0.9.0 (was 0.8.0) (#1898)

* release: Release opentelemetry-metrics-sdk 0.9.0 (was 0.8.0)

* Update metrics_sdk/CHANGELOG.md

---------

Co-authored-by: OpenTelemetry Bot <[email protected]>
Co-authored-by: Kayla Reopelle <[email protected]>

Author: 3 people

metrics_sdk/CHANGELOG.md

@@ -1,5 +1,9 @@
 # Release History: opentelemetry-metrics-sdk
 
+### v0.9.0 / 2025-08-19
+
+* ADDED: Add `LOWMEMORY` option to `OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE`
+
 ### v0.8.0 / 2025-08-14
 
 - BREAKING CHANGE: Update default aggregation temporality for counter, histogram, and up down counter to cumulative

metrics_sdk/lib/opentelemetry/sdk/metrics/version.rb

@@ -8,7 +8,7 @@ module OpenTelemetry
   module SDK
     module Metrics
       # Current OpenTelemetry metrics sdk version
-      VERSION = '0.8.0'
+      VERSION = '0.9.0'
     end
   end
 end