Missing 'r' in TF_INFRACOST_* variable

TF_INFACOST_USAGE_FILE/infacost-usage-file should be renamed TF_INFRACOST_USAGE_FILE/infracost-usage-file

kicker.json:          "name": "TF_INFACOST_USAGE_FILE",
README.md:| `infacost-usage-file` / `TF_INFACOST_USAGE_FILE` | infracost [usage file](https://www.infracost.io/docs/usage_based_resources/#infracost-usage-file) | `infracost-usage.yml` |
templates/gitlab-ci-terraform.yml:    infacost-usage-file:
templates/gitlab-ci-terraform.yml:  TF_INFACOST_USAGE_FILE: $[[ inputs.infacost-usage-file ]]
templates/gitlab-ci-terraform.yml:    if [[ "${TF_INFACOST_USAGE_FILE}" ]];then
templates/gitlab-ci-terraform.yml:      tf_usagefile="--sync-usage-file --usage-file ${TF_INFACOST_USAGE_FILE}"