Prepare 0.16.0 release (#139)

CONTRIBUTING.md

@@ -16,7 +16,8 @@ please make sure to add an entry for your change in the "Unreleased" section.
 ## Release instructions for maintainers
 
 1. Add new desired version number in all `CHANGELOG.md` files (instead of "Unreleased") and ensure no (relevant) entries are missing
-   - This currently only applies to [semantic-conventions/CHANGELOG.md](./semantic-conventions/CHANGELOG.md)
+   - This currently applies to [semantic-conventions/CHANGELOG.md](./semantic-conventions/CHANGELOG.md)
+     and [schemas/CHANGELOG.md](./schemas/CHANGELOG.md).
 2. Create the release at <https://github.com/open-telemetry/build-tools/releases/new>
    1. Tag: `v0.xx.y`
    2. Title: `Release version 0.xx.y`

schemas/CHANGELOG.md

@@ -0,0 +1,14 @@
+# Changelog
+
+Please update the changelog as part of any significant pull request.
+
+## Unreleased
+
+## v0.16.0
+
+- Update schema check tool to include bug fix #3777 in Otel Go.
+  ([#138](https://github.com/open-telemetry/build-tools/pull/138))
+
+## v0.15.1 and earlier
+
+We didn't track changes in this directly for these versions.

semantic-conventions/CHANGELOG.md

@@ -4,6 +4,10 @@ Please update the changelog as part of any significant pull request.
 
 ## Unreleased
 
+## v0.16.0
+
+- No changes.
+
 ## v0.15.1
 
 - Move footnotes back together with the rendered table in Markdown