up.yml opens pull requests titled "New version in README", because env.version is never set #9349

.github/workflows/up.yml computes the tag in a shell variable and never exports it to the job environment:

latest=$(git tag --sort=creatordate | tail -1) && \
export latest && \
sed -E -i "s/<version>[^<]+/<version>${latest}/g" eo-maven-plugin/README.md

The next step then reads a variable with a different name, which nothing defines (lines 33 and 35):

commit-message: 'new version ${{ env.version }} in README'
title: 'New version ${{ env.version }} in README'

So every pull request and commit made by this workflow has an empty version, for example #9082, #8310, #7839, #6185, #5275: all titled New version in README, with two spaces. The reviewer has to open the diff to see which version it bumps to.

It should write the tag to GITHUB_ENV (or a step output) under the name the next step reads, so the title says New version 0.63.2 in README.