Fix typo in jsonnet dependency upgrade GH actions

Replace `commiter` to `committer`.

Refer https://github.com/peter-evans/create-pull-request#action-inputs

 for more
info about supported input properties for `peter-evans/create-pull-request@v3`.

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>