[repo] Prepare release coreunstable-1.9.0-alpha.1 (#5634)

github-actions[bot] · web-flow · commit 6c0327c4c6e7 · 2024-05-20T14:23:39.000-07:00
Co-authored-by: github-actions[bot] &lt;41898282+github-actions[bot]@users.noreply.github.com&gt;
diff --git a/src/OpenTelemetry.Exporter.Prometheus.AspNetCore/CHANGELOG.md b/src/OpenTelemetry.Exporter.Prometheus.AspNetCore/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.9.0-alpha.1
+
+Released 2024-May-20
+
 * Fixed an issue with corrupted buffers when reading both OpenMetrics and
   plain text formats from Prometheus exporters.
   ([#5623](https://github.com/open-telemetry/opentelemetry-dotnet/pull/5623))
diff --git a/src/OpenTelemetry.Exporter.Prometheus.HttpListener/CHANGELOG.md b/src/OpenTelemetry.Exporter.Prometheus.HttpListener/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.9.0-alpha.1
+
+Released 2024-May-20
+
 * Fixed an issue with corrupted buffers when reading both OpenMetrics and
   plain text formats from Prometheus exporters.
   ([#5623](https://github.com/open-telemetry/opentelemetry-dotnet/pull/5623))
diff --git a/src/OpenTelemetry.Shims.OpenTracing/CHANGELOG.md b/src/OpenTelemetry.Shims.OpenTracing/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.9.0-alpha.1
+
+Released 2024-May-20
+
 ## 1.7.0-beta.1
 
 Released 2023-Dec-08
