github: workflows: fix yaml error for issue close workflowRun yamllint -f parsable -d "$yamllint_config" --strict .github/workflows/*.yml *.yml

yamllint -f parsable -d "$yamllint_config" --strict .github/workflows/*.yml *.yml
  shell: /usr/bin/bash -e {0}
  env:
    yamllint_config: {extends: default, rules: {line-length: {max: 100}}}
Warning: orkflows/close-stale.yml:3:1: [warning] truthy value should be one of [false, true] (truthy)
Error: Process completed with exit code 2.

Looks like a copy and paste error from:
https://docs.github.com/en/actions/how-tos/use-cases-and-examples/project-management/closing-inactive-issues

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Author: lrgirdwo

.github/workflows/close-stale.yml

@@ -1,4 +1,3 @@
----
 name: "Close stale issues"
 on:
   schedule: