Changelog: cut release 0.38-rc.0 (#8174)

Signed-off-by: Michael Hoffmann <mhoffmann@cloudflare.com>

Author: MichaHoffmann

CHANGELOG.md

@@ -18,7 +18,7 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 
 ### Fixed
 
-## [v0.38.0 - <in progress>](https://github.com/thanos-io/thanos/tree/release-0.38)
+## [v0.38.0-rc.0] https://github.com/thanos-io/thanos/tree/release-0.38)
 
 ### Fixed
 - [#8091](https://github.com/thanos-io/thanos/pull/8091) *: Add POST into allowed CORS methods header
@@ -36,6 +36,8 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 - [#8131](https://github.com/thanos-io/thanos/pull/8131) Store Gateway: Optimize regex matchers for .* and .+. #8131
 - [#7808](https://github.com/thanos-io/thanos/pull/7808) Query: Support chain deduplication algorithm.
 - [#8158](https://github.com/thanos-io/thanos/pull/8158) Rule: Add support for query offset.
+- [#8110](https://github.com/thanos-io/thanos/pull/8110) Compact: implement native histogram downsampling.
+- [#7996](https://github.com/thanos-io/thanos/pull/7996) Receive: Add OTLP endpoint.
 
 ### Changed
 

VERSION

@@ -1 +1 @@
-0.39.0-dev
+0.38.0-rc.0

docs/release-process.md

@@ -23,6 +23,8 @@ Release shepherd responsibilities:
 
 | Release | Time of first RC | Shepherd (GitHub handle)      |
 |---------|------------------|-------------------------------|
+| v0.38.0 | 2025.03.25       | `@MichaHoffmann`              |
+| v0.37.0 | 2024.11.19       | `@saswatamcode`               |
 | v0.36.0 | 2024.06.26       | `@MichaHoffmann`              |
 | v0.35.0 | 2024.04.09       | `@saswatamcode`               |
 | v0.34.0 | 2024.01.14       | `@MichaHoffmann`              |

website/hugo.yaml

@@ -28,6 +28,7 @@ permalinks:
   # TODO(bwplotka): Move to mdox + fixes to ensure we don't need to manually do this.
   # For now we added few entries for advance.
   tip: "/:sections/:filename.md"
+  v0.38: "/:sections/:filename.md"
   v0.37: "/:sections/:filename.md"
   v0.36: "/:sections/:filename.md"
   v0.35: "/:sections/:filename.md"