update version docs about versioning (#2086)

Adds changes from
https://github.com/woodpecker-ci/woodpecker/pull/2043/files to v1.0
docs.

docs/versioned_docs/version-1.0/80-downloads.md

@@ -13,10 +13,11 @@ To find out more about the differences between the two releases, please read the
 ## Docker images
 
 Image variants:
-* The `latest` image is the latest stable release
-* The `vX.X.X` images are stable releases
-* The `vX.X` images are based on the latest patch version of a specific minor release (see [Semver](https://semver.org/))
-* The `next` images are based on the current master branch and should not be used for production environments
+
+- The `latest` image is the latest stable release
+- The `vX.X.X` images are stable releases
+- The `vX.X` images are based on the current release branch (e.g. `release/v1.0`) and can be used to get bugfixes asap
+- The `next` images are based on the current `main` branch and should not be used for production environments
 
 ``` bash
 # server