Made release failures easier to recover

Currently, it is difficult to recover from failures when the release step fails. For example, we have accidentally published 1.0.0 version some time ago (more info: #51). Now it is not possible to delete this version.

This change reorders the release steps: *first* we tag and release on GitHub (easy to revert), *then* we publish to Gradle plugins portal (harder to revert). 

This change prevents problems like #51 and makes them easier to recover from.

.github/workflows/ci.yml

@@ -41,7 +41,7 @@ jobs:
           && github.ref == 'refs/heads/master'
           && github.repository == 'shipkit/shipkit-changelog'
           && !contains(toJSON(github.event.commits.*.message), '[skip release]')
-      run: ./gradlew publishPlugins githubRelease --scan
+      run: ./gradlew githubRelease publishPlugins --scan
       env:
           # Gradle env variables docs: https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_environment_variables
           GRADLE_PUBLISH_KEY: ${{ secrets.GRADLE_PUBLISH_KEY }}