Update release to only run on tags.

Author: douglasthomsen

RELEASING.md

@@ -1,9 +1,12 @@
 # Releasing
 
-Releases are handled by [`sbt-ci-release`](https://github.com/olafurpg/sbt-ci-release) and [Github Actions](../.github/workflows/release.yml). Random versions are automatically deployed when changes are merged to main. To create a new semvar'ed version, do the following:
+Releases are handled by [`sbt-ci-release`](https://github.com/olafurpg/sbt-ci-release) and [Github Actions](../.github/workflows/release.yml). To release a new version do the following:
 
-```bash
-git tag -a v0.1.0
-# add notes about what changed
-git push origin v0.1.0
-```
+1. Go [here](https://github.com/Iterable/sbt-codeartifact/releases/new)
+2. In the `Choose a tag` dropdown, create a new tag with the following format `v[0-9]+.[0-9]+.[0-9]`. For example `v0.0.1` is a valid release number but `0.0.1` and `0.1` are not.
+3. Make sure the `Target` branch is set correctly.
+4. Select the correct `Previous tag`.
+5. Click the `Generate release notes` button.
+6. Click the `Publish release` button.
+
+Once this is done it will trigger a github action that will publish this version to maven central.