hack/tf-fmt: Add a workaround for origin/release's hardcoding v0.11.7

We'll want to revert this once we bump [1] to point to the new image.
I've filed [2] with that bump.

[1]: https://github.com/openshift/release/blob/4ea9040eeb4131730af491d2feb926a889a0bd62/ci-operator/jobs/openshift/installer/openshift-installer-presubmits.yaml#L281
[2]: openshift/release#1515

Author: wking

hack/tf-fmt.sh

@@ -6,7 +6,7 @@ if [ "$IS_CONTAINER" != "" ]; then
     set -- -list -check -write=false
   fi
   set -x
-  terraform fmt "${@}"
+  /terraform fmt "${@}"  # FIXME: drop this slash after we update openshift/release
 else
   podman run --rm \
     --env IS_CONTAINER=TRUE \