release Github workflow process fail when there are branches left in upstream

[sanderegg]

- name: set target variable
        run: |
          target=$(git name-rev --refs="refs/remotes/origin/*" --name-only ${GITHUB_SHA})
          echo "TARGET=${target}" >> $GITHUB_ENV

if there are branches left over from the dependabot, then this call fails to retrieve the branch name.

It should be replaced by this:

- name: find branch name
        shell: bash
        run: echo "BRANCH_NAME=$(echo ${GITHUB_REF#refs/heads/} | tr / -)" >> $GITHUB_ENV

to be tested of course!