Fix ref regression

Author: benc-uk

action.yaml

@@ -15,7 +15,6 @@ inputs:
  ref:
  description: 'The reference can be a branch, tag, or a commit SHA'
  required: false
- default: ${{ github.ref }}
  repo:
  description: 'Repo owner & name, slash separated, only set if invoking a workflow in a different repo'
  required: false

src/main.ts

@@ -26,7 +26,7 @@ async function run(): Promise<void> {
 
  // Optional inputs, with defaults
  const token = core.getInput('token')
- const ref = core.getInput('ref')
+ const ref = core.getInput('ref') || github.context.ref
  const [owner, repo] = core.getInput('repo')
  ? core.getInput('repo').split('/')
  : [github.context.repo.owner, github.context.repo.repo]