Allow committing new example bundle

[luciansmith]

Something about the ci that is supposed to check if the zip bundle changed and, if so, commit it, is broken. Use https://github.com/SED-ML/sed-ml.github.io/tree/test-ci-for-changed-example for testing.

[jonrkarr]

It looks like GitHub changed the syntax for communicating outputs of steps. See https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/.

At

sed-ml.github.io/.github/workflows/ci.yml

Line 146 in c7fdbad

echo "::set-output name=changed::$changed"

,

run: |
   ...
   echo "::set-output name=changed::$changed"

needs to be changed to

run: |
   ...
   echo "changed=$changed" >> $GITHUB_OUTPUT

The same change needs to be applied to all uses of ::set-output in ci.yml.