Update versioning policy (#11666)

See #10808 (comment)

docs/reference/policies/versioning.md

@@ -3,8 +3,12 @@
 uv uses a custom versioning scheme in which the minor version number is bumped for breaking changes,
 and the patch version number is bumped for bug fixes, enhancements, and other non-breaking changes.
 
-uv does not yet have a stable API; once uv's API is stable (v1.0.0), the versioning scheme will
-adhere to [Semantic Versioning](https://semver.org/).
+uv is widely used in production. However, we value the ability to iterate on new features quickly
+and gather changes that _could_ be breaking into clearly marked releases.
+
+Once uv v1.0.0 is released, the versioning scheme will adhere to
+[Semantic Versioning](https://semver.org/). There is not a particular goal that must be achieved for
+uv to reach this milestone.
 
 uv's changelog can be [viewed on GitHub](https://github.com/astral-sh/uv/blob/main/CHANGELOG.md).